350 tbi running rough

Sep 14, 2008 · i have an 1988 chevy c2500 350 tbi (365,000 miles on original engine) was running fine started running rough and stalled at idle, determined the fuel injectors went out, replaced fuel injectors and re … 4 Answers 1991 GMC TBI 350 sierra stalls bad I have a 1991 GMC Sierra 350 5.7L. It runs really really rough on start up, when the weather is warner it runs better, not good, just better. I have replaced plugs, wire, pick up coil, ignition coil, rotor and fuel filter. Jul 06, 2011 · i have an 1988 chevy c2500 350 tbi (365,000 miles on original engine) was running fine started running rough and stalled at idle, determined the fuel injectors went out, replaced fuel injectors and re … read more If the engine runs 0K, check: Faulty light bulb. CKT 419 open. Gage fuse blown. This will result in no stop lights, oil or generator lights, seat belt reminder, etc. If the engine cranks but will not run, check: Continuous battery-fuse or fusible link open. ECM ignition fuse open. Battery CKT 340 to ECM open. Feb 23, 2006 · Discussion Starter · #1 · Feb 23, 2006. this engine runs rough when cold misfires and so on, then when hot while running at higher speeds it backfires through the tbi unit. I changed the plugs and there is no change. It seems as though it shut of an on in a split second as im driving it. this problem happend suddenly and im not sure if it is ... May 21, 2017 · There is a switch in the throttle position sensor that is supposed to be triggered when the throttle lever goes to idle to tell the computer to idle. But since the linkage didn’t go to the stop, the idle switch wasn’t turned on so the computer didn’t know to idle and caused the engine to run rough. Mar 28, 2017 · Engine Size 350 My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. Leaking vacuum hoses replaced 4. Tightened loose spark plug 5. Replaced fuel filter Here is the rest of the story. #1 Starts and runs/idles rough until you accellerate some the it smooths out and runs like it should. The exhaust smells "gassy" like it is running rich. NO codes or SES. Could it possibly be the temp sensor for the ECM - giving it a false reading and the computer is feeding it more gas than it needs?Any advise is appreciated 1 Answer Truck running rough I have a 1989 chevy truck with a 350 tbi motor. Tuned it up with cap, rotor button,plugs. (wires were new last season). The truck still was missing. Checked the ignition coil and thought it was arching. I bought a new coil and installed it. Truck will not start. Sep 22, 2016 · So I have an 87 Silverado half ton. 350 TBI with turbo 350 trans. It runs awful until up to operating temp and still lacks power then. it turns over for a few seconds, then has a fluctuating idle until warm, once put in gear the idle speed lowers (no tach so not sure on rpms) and taking off from a stop it bogs out, stalls, sputters etc. There is a switch in the throttle position sensor that is supposed to be triggered when the throttle lever goes to idle to tell the computer to idle. But since the linkage didn't go to the stop, the idle switch wasn't turned on so the computer didn't know to idle and caused the engine to run rough.1991 GMC TBI 350 sierra stalls bad. I have a 1991 GMC Sierra 350 5.7L. It runs really really rough on start up, when the weather is warner it runs better, not good, just better. I have replaced plugs, wire, pick up coil, ignition coil, rotor and fuel filter. I am stumped on this one, i usually am pretty good at working on vehicles, but i am at ... 1991 GMC TBI 350 sierra stalls bad. I have a 1991 GMC Sierra 350 5.7L. It runs really really rough on start up, when the weather is warner it runs better, not good, just better. I have replaced plugs, wire, pick up coil, ignition coil, rotor and fuel filter. I am stumped on this one, i usually am pretty good at working on vehicles, but i am at ... Mar 28, 2017 · 350. My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. If the EGR valve is stuck open due to a carbon chip you will notice rough running at idle and low speeds when it is supposed to be closed, but it normally opens at higher speeds. You shouldn't feel it there. Throttle position sensor won't cause this either. At worst it will cause a hesitation or stumble on acceleration. Mar 28, 2017 · 350. My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. Mar 28, 2017 · 350. My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. Rough idle chevy 350 We have run scanners and check or change everything we think possible from head gaskets, valve job, exhaust system, computer, icm, throttle body rebuild, changed injectors, new egr valve, fuel pump and. reasons to deny overnight visitation Aug 26, 2009 · Discussion Starter · #1 · Aug 27, 2009 i have a tbi 350 out of a 90 suburban in my jeep. all original harness came out of the suburban and straight into my buggy. it idles rough and acts like its running really rich, then when you take it out to drive it, as soon as you step on it to put a load on, it cuts out and backfires. any ideas? J Joush Apr 17, 2019 · After the 10 seconds of fuel pump priming, it starts right up but immediately runs very rough where the engine, tailpipes and doors shake if open. The exhaust sort of flutters out the tailpipes and smells very much like un-burnt gas or as if it is running rich. girl scouts and catholic church Feb 23, 2006 · this engine runs rough when cold misfires and so on, then when hot while running at higher speeds it backfires through the tbi unit. I changed the plugs and there is no change. It seems as though it shut of an on in a split second as im driving it. this problem happend suddenly and im not sure if it is a cap&rotor or timing chain. After the 10 seconds of fuel pump priming, it starts right up but immediately runs very rough where the engine, tailpipes and doors shake if open. The exhaust sort of flutters out the tailpipes and smells very much like un-burnt gas or as if it is running rich.Rough idle chevy 350 We have run scanners and check or change everything we think possible from head gaskets, valve job, exhaust system, computer, icm, throttle body rebuild, changed injectors, new egr valve, fuel pump and. reasons to deny overnight visitation Feb 23, 2006 · this engine runs rough when cold misfires and so on, then when hot while running at higher speeds it backfires through the tbi unit. I changed the plugs and there is no change. It seems as though it shut of an on in a split second as im driving it. this problem happend suddenly and im not sure if it is a cap&rotor or timing chain. It will start normal then start like a out of time miss.. then if you try to throttle up any.. it backfires and stumbles.. and then after about 1 min of running.. it clears up and acts normal! Good fuel pressure.. recent tune up.. new ignition module.. dont want to throw much more at it without more concrete ideas.. there are no dtc's either...#1 Starts and runs/idles rough until you accellerate some the it smooths out and runs like it should. The exhaust smells "gassy" like it is running rich. NO codes or SES. Could it possibly be the temp sensor for the ECM - giving it a false reading and the computer is feeding it more gas than it needs?Any advise is appreciated Feb 17, 2020 · Discussion Starter · #1 · Feb 17, 2020 1991 K5 TBI 350 with SM465. One out of five times the idle will seem to fall out when taking it out of gear and coming to a stop. It feels like a misfire. It will correct itself after about 5 seconds, can usually correct it a little quicker by revving. Apr 05, 2012 · Also has a small miss it seems at a idle and is idled high to my ear truck does not have a tach. so here is what I have done 1. Complete tune up all plugs/wires/rot/button/filters 2. Have changed all vacuum lines 3. EGR sensor 4. Rebuilt the entire TBI all new gaskets and o rings. After some research I let the truck warm up to temp, shut the truck off, unplug the ECM wire, and restart the truck Using the timing light I re adjust the timing to the factory 0 degrees to no avail. Compression test just to cover my bases had the readings as follows 1-151 8-124 4-148 3-146 6-145 5-146 7-141 2-152The donor tbi 350 still runs but tranny missing 2 gears and it smokes alittle. ... The car runs rough throughout the rpm range and put out black smoke while doing so. If I take off from a stop at 3/4 or full throttle and speed up to 50-60mph, I notice the engine/driveline has a sluggish feeling. TBI 350 runs extremely rough, can't solve.Any advise is appreciated Mar 28, 2017 · 350. My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. After the 10 seconds of fuel pump priming, it starts right up but immediately runs very rough where the engine, tailpipes and doors shake if open. The exhaust sort of flutters out the tailpipes and smells very much like un-burnt gas or as if it is running rich.Discussion Starter · #1 · Aug 27, 2009 i have a tbi 350 out of a 90 suburban in my jeep. all original harness came out of the suburban and straight into my buggy. it idles rough and acts like its running really rich, then when you take it out to drive it, as soon as you step on it to put a load on, it cuts out and backfires. any ideas? J Joush asu frat rankings If your chevy gm tbi is running rich this will help you trouble shoot it and fix itDon't Forget to Subscribe today for more fact or fiction, diy ,how to car ...1 Answer Truck running rough I have a 1989 chevy truck with a 350 tbi motor. Tuned it up with cap, rotor button,plugs. (wires were new last season). The truck still was missing. Checked the ignition coil and thought it was arching. I bought a new coil and installed it. Truck will not start. Feb 23, 2006 · Discussion Starter · #1 · Feb 23, 2006. this engine runs rough when cold misfires and so on, then when hot while running at higher speeds it backfires through the tbi unit. I changed the plugs and there is no change. It seems as though it shut of an on in a split second as im driving it. this problem happend suddenly and im not sure if it is ... Nov 13, 2006 · #1 Starts and runs/idles rough until you accellerate some the it smooths out and runs like it should. The exhaust smells "gassy" like it is running rich. NO codes or SES. Could it possibly be the temp sensor for the ECM - giving it a false reading and the computer is feeding it more gas than it needs? If your chevy gm tbi is running rich this will help you trouble shoot it and fix itDon't Forget to Subscribe today for more fact or fiction, diy ,how to car ... If your chevy gm tbi is running rich this will help you trouble shoot it and fix itDon't Forget to Subscribe today for more fact or fiction, diy ,how to car ...Any advise is appreciated Mar 28, 2017 · 350. My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. Jul 29, 2021 · After some research I let the truck warm up to temp, shut the truck off, unplug the ECM wire, and restart the truck Using the timing light I re adjust the timing to the factory 0 degrees to no avail. Compression test just to cover my bases had the readings as follows 1-151 8-124 4-148 3-146 6-145 5-146 7-141 2-152 4 Answers 1991 GMC TBI 350 sierra stalls bad I have a 1991 GMC Sierra 350 5.7L. It runs really really rough on start up, when the weather is warner it runs better, not good, just better. I have replaced plugs, wire, pick up coil, ignition coil, rotor and fuel filter. Any advise is appreciated Apr 05, 2012 · Discussion Starter · #1 · Apr 5, 2012. Hello, I own a 1990 chevy 1500 2wd truck it has a tbi 350 that me and my dad rebuilt several years ago sold the truck to brother in law and just bought it back It was running a little rough at first then I had the truck painted and now it has a extremely rough idle. Will cut off in reverse and some at ... Jan 04, 2019 · Throttle body fuel injector pressure is supposed to be 12 psi if you can verify that with a gauge hook up somewhere. You mentioned that you replaced the fuel pressure regulator in the throttle body, but that's not where it's located. The fuel pressure regulator has to be the problem if there's too much pressure. 1 Answer Truck running rough I have a 1989 chevy truck with a 350 tbi motor. Tuned it up with cap, rotor button,plugs. (wires were new last season). The truck still was missing. Checked the ignition coil and thought it was arching. I bought a new coil and installed it. Truck will not start. Jun 14, 2019 · i have an 1988 chevy c2500 350 tbi (365,000 miles on original engine) was running fine started running rough and stalled at idle, determined the fuel injectors went out, replaced fuel injectors and re … read more Apr 09, 2010 · My 350 TBI in my truck is becoming undriveable with a really bad bog and hesitation/stumble when I try and take off at any rpm or speed. It's pretty much always there, I can get it to behave a bit once I'm moving but that's really only between 20 and 40 mph and that's by hitting the sweet spots. Jul 06, 2011 · i have an 1988 chevy c2500 350 tbi (365,000 miles on original engine) was running fine started running rough and stalled at idle, determined the fuel injectors went out, replaced fuel injectors and re … read more Sep 14, 2008 · i have an 1988 chevy c2500 350 tbi (365,000 miles on original engine) was running fine started running rough and stalled at idle, determined the fuel injectors went out, replaced fuel injectors and re … Feb 23, 2006 · this engine runs rough when cold misfires and so on, then when hot while running at higher speeds it backfires through the tbi unit. I changed the plugs and there is no change. It seems as though it shut of an on in a split second as im driving it. this problem happend suddenly and im not sure if it is a cap&rotor or timing chain. 1995 Chevy K1500 203K mi. 350 TBI /auto Rough idle & hesitating Everything was good until I stopped at a red light and the idle dropped really low and rough , when the light changed I tried to accelerate but had no power, stumbling and hesitating, felt like I was running out of gas but had almost 1/2 tank.It feels like an old carb with a bad accelerator pump, give it a little gas and it.Nov 13, 2006 · #1 Starts and runs/idles rough until you accellerate some the it smooths out and runs like it should. The exhaust smells "gassy" like it is running rich. NO codes or SES. Could it possibly be the temp sensor for the ECM - giving it a false reading and the computer is feeding it more gas than it needs? Jun 22, 2021 · Solution: Check for leaks in the vacuum lines. There might be one or more snapped vacuum lines that you need to fix. Here’s a blog to help you find and fix a vacuum leak in your Chevy 350 TBI. #2. Worn Out Spark Plugs Mostly, bogging is caused due to worn-out spark plugs, especially if you have a habit of revving your car a lot. Any advise is appreciated Apr 09, 2010 · My 350 TBI in my truck is becoming undriveable with a really bad bog and hesitation/stumble when I try and take off at any rpm or speed. It's pretty much always there, I can get it to behave a bit once I'm moving but that's really only between 20 and 40 mph and that's by hitting the sweet spots. Any advise is appreciated Jan 11, 2011 · hey guys, i recently aquired a 91 chevy c2500 with a new rebuilt 350 tbi. problem is that i cant seem to get the truck to idle or run correctly. it will run while fluttering the pedal but that is all. changed temp sensor, erg, cleaned and rebuilt the tbi, replaced all vac lines, fuel filter, added sea foam....and a few others. i have read that it … If the engine runs 0K, check: Faulty light bulb. CKT 419 open. Gage fuse blown. This will result in no stop lights, oil or generator lights, seat belt reminder, etc. If the engine cranks but will not run, check: Continuous battery-fuse or fusible link open. ECM ignition fuse open. Battery CKT 340 to ECM open. Mar 28, 2017 · 350. My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. Nov 13, 2006 · #1 Starts and runs/idles rough until you accellerate some the it smooths out and runs like it should. The exhaust smells "gassy" like it is running rich. NO codes or SES. Could it possibly be the temp sensor for the ECM - giving it a false reading and the computer is feeding it more gas than it needs? Apr 22, 2010 · Corpus Christi, TX Apr 22, 2010 #7 I'm fairly certain that it was raw fuel since the exhaust started burning my eyes. It was wet and soot was hitting the wooden fence as well. I suppose it could be some condensation. Like I said, the odd thing is that it ran fine when I first started it and it could be reved normally and everything. Dec 11, 2019 · First off, 1988 350 tbi fully rebuilt kept it stock other than .030 over on the bore. Trouble starting after it sits for awhile do to not getting fuel right away. Once it does it fires no problem and idles very nice in park and neutral. In gear it bogs slightly and feels like i put a bigger cam in it. Little rough. 1991 GMC TBI 350 sierra stalls bad. I have a 1991 GMC Sierra 350 5.7L. It runs really really rough on start up, when the weather is warner it runs better, not good, just better. I have replaced plugs, wire, pick up coil, ignition coil, rotor and fuel filter. I am stumped on this one, i usually am pretty good at working on vehicles, but i am at ... May 21, 2017 · There is a switch in the throttle position sensor that is supposed to be triggered when the throttle lever goes to idle to tell the computer to idle. But since the linkage didn’t go to the stop, the idle switch wasn’t turned on so the computer didn’t know to idle and caused the engine to run rough. Nov 22, 2003 · It has a TBI 350 that I just had rebuilt. Stock bore, 9.5:1 pistons, "mild" cam (don't know exact specs), Stock TBI and intake, stock exhaust, stock ignition. I have the timing set at about 10 deg. It idles OK before I hook the ECM back to the distributer but soon as I plug it in, it goes to crap. Won't idle on it's own but runs OK down the road. Sep 14, 2008 · i have an 1988 chevy c2500 350 tbi (365,000 miles on original engine) was running fine started running rough and stalled at idle, determined the fuel injectors went out, replaced fuel injectors and re … Jul 13, 2006 · Running rich on a TBI system is usually one of, Too high fuel pressure (not common) bad o2 (common) bad Map sensor or vacuum to it (TBI carboned up in base) (common) bad temp sensor, or most common of all, a bad ground to the temp sensor. It uses the ground that goes to the T/stat housing and they get broken and corroded. Sep 22, 2016 · So I have an 87 Silverado half ton. 350 TBI with turbo 350 trans. It runs awful until up to operating temp and still lacks power then. it turns over for a few seconds, then has a fluctuating idle until warm, once put in gear the idle speed lowers (no tach so not sure on rpms) and taking off from a stop it bogs out, stalls, sputters etc. Jan 04, 2019 · Throttle body fuel injector pressure is supposed to be 12 psi if you can verify that with a gauge hook up somewhere. You mentioned that you replaced the fuel pressure regulator in the throttle body, but that's not where it's located. The fuel pressure regulator has to be the problem if there's too much pressure. Apr 17, 2019 · After the 10 seconds of fuel pump priming, it starts right up but immediately runs very rough where the engine, tailpipes and doors shake if open. The exhaust sort of flutters out the tailpipes and smells very much like un-burnt gas or as if it is running rich. Dec 11, 2019 · First off, 1988 350 tbi fully rebuilt kept it stock other than .030 over on the bore. Trouble starting after it sits for awhile do to not getting fuel right away. Once it does it fires no problem and idles very nice in park and neutral. In gear it bogs slightly and feels like i put a bigger cam in it. Little rough. Mar 28, 2017 · 350. My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. Any advise is appreciated Feb 23, 2006 · Discussion Starter · #1 · Feb 23, 2006. this engine runs rough when cold misfires and so on, then when hot while running at higher speeds it backfires through the tbi unit. I changed the plugs and there is no change. It seems as though it shut of an on in a split second as im driving it. this problem happend suddenly and im not sure if it is ... Nov 22, 2003 · It has a TBI 350 that I just had rebuilt. Stock bore, 9.5:1 pistons, "mild" cam (don't know exact specs), Stock TBI and intake, stock exhaust, stock ignition. I have the timing set at about 10 deg. It idles OK before I hook the ECM back to the distributer but soon as I plug it in, it goes to crap. Won't idle on it's own but runs OK down the road. Rough idle chevy 350 We have run scanners and check or change everything we think possible from head gaskets, valve job, exhaust system, computer, icm, throttle body rebuild, changed injectors, new egr valve, fuel pump and. reasons to deny overnight visitation Jul 24, 2016 · On the vortec 350 you need at least 60 PSI of pressure from the fuel pump or it won't even start. Have you considered a torque converter problem causing the stalling? M Makr Registered Joined Aug 17, 2016 4 Posts #18 · Aug 17, 2016 I suppose if it won't idle in neutral it can't be the torque converter xPosTech Registered Joined Nov 19, 2010 If the engine runs 0K, check: Faulty light bulb. CKT 419 open. Gage fuse blown. This will result in no stop lights, oil or generator lights, seat belt reminder, etc. If the engine cranks but will not run, check: Continuous battery-fuse or fusible link open. ECM ignition fuse open. Battery CKT 340 to ECM open. Jun 22, 2021 · Solution: Check for leaks in the vacuum lines. There might be one or more snapped vacuum lines that you need to fix. Here’s a blog to help you find and fix a vacuum leak in your Chevy 350 TBI. #2. Worn Out Spark Plugs Mostly, bogging is caused due to worn-out spark plugs, especially if you have a habit of revving your car a lot. 1992 CHEVY 350 TBI IDLES ROUGH WHEN STARTED.ACTS LIKE IT IS TOO .WANTS TO DIE WHEN PUT IN GEAR AND BLOWS BLACK SMOKE AND - Answered by a verified Chevy Mechanic. We use cookies to give you the best possible experience on our website. ... 87 350 TBI when step on throttle runs rough and blows black.Jul 13, 2006 · Running rich on a TBI system is usually one of, Too high fuel pressure (not common) bad o2 (common) bad Map sensor or vacuum to it (TBI carboned up in base) (common) bad temp sensor, or most common of all, a bad ground to the temp sensor. It uses the ground that goes to the T/stat housing and they get broken and corroded. Oct 21, 2012 · The vehicle ran perfectly as long as it wasn't idling. It idles extremely rough, and has been stalling. There is no tach, but it seems like it's falling bellow 500 in drive and maybe sitting at 750ish in park. I set the timing by ear (got it to where it ran much better) but it still has this crazy erratic idle. Mar 23, 2002 · All groups and messages ... ... Any advise is appreciated Feb 23, 2006 · Discussion Starter · #1 · Feb 23, 2006. this engine runs rough when cold misfires and so on, then when hot while running at higher speeds it backfires through the tbi unit. I changed the plugs and there is no change. It seems as though it shut of an on in a split second as im driving it. this problem happend suddenly and im not sure if it is ... 4 Answers 1991 GMC TBI 350 sierra stalls bad I have a 1991 GMC Sierra 350 5.7L. It runs really really rough on start up, when the weather is warner it runs better, not good, just better. I have replaced plugs, wire, pick up coil, ignition coil, rotor and fuel filter. priest bis tbc phase 5 Jul 29, 2021 · After some research I let the truck warm up to temp, shut the truck off, unplug the ECM wire, and restart the truck Using the timing light I re adjust the timing to the factory 0 degrees to no avail. Compression test just to cover my bases had the readings as follows 1-151 8-124 4-148 3-146 6-145 5-146 7-141 2-152 Apr 22, 2010 · Corpus Christi, TX Apr 22, 2010 #7 I'm fairly certain that it was raw fuel since the exhaust started burning my eyes. It was wet and soot was hitting the wooden fence as well. I suppose it could be some condensation. Like I said, the odd thing is that it ran fine when I first started it and it could be reved normally and everything. 1991 GMC TBI 350 sierra stalls bad. I have a 1991 GMC Sierra 350 5.7L. It runs really really rough on start up, when the weather is warner it runs better, not good, just better. I have replaced plugs, wire, pick up coil, ignition coil, rotor and fuel filter. I am stumped on this one, i usually am pretty good at working on vehicles, but i am at ... Discussion Starter · #1 · Aug 27, 2009 i have a tbi 350 out of a 90 suburban in my jeep. all original harness came out of the suburban and straight into my buggy. it idles rough and acts like its running really rich, then when you take it out to drive it, as soon as you step on it to put a load on, it cuts out and backfires. any ideas? J JoushMar 23, 2002 · All groups and messages ... ... Mar 28, 2017 · 350. My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. Nov 22, 2003 · It has a TBI 350 that I just had rebuilt. Stock bore, 9.5:1 pistons, "mild" cam (don't know exact specs), Stock TBI and intake, stock exhaust, stock ignition. I have the timing set at about 10 deg. It idles OK before I hook the ECM back to the distributer but soon as I plug it in, it goes to crap. Won't idle on it's own but runs OK down the road. If the engine runs 0K, check: Faulty light bulb. CKT 419 open. Gage fuse blown. This will result in no stop lights, oil or generator lights, seat belt reminder, etc. If the engine cranks but will not run, check: Continuous battery-fuse or fusible link open. ECM ignition fuse open. Battery CKT 340 to ECM open. It will start normal then start like a out of time miss.. then if you try to throttle up any.. it backfires and stumbles.. and then after about 1 min of running.. it clears up and acts normal! Good fuel pressure.. recent tune up.. new ignition module.. dont want to throw much more at it without more concrete ideas.. there are no dtc's either...Apr 17, 2019 · After the 10 seconds of fuel pump priming, it starts right up but immediately runs very rough where the engine, tailpipes and doors shake if open. The exhaust sort of flutters out the tailpipes and smells very much like un-burnt gas or as if it is running rich. Any advise is appreciated There is a switch in the throttle position sensor that is supposed to be triggered when the throttle lever goes to idle to tell the computer to idle. But since the linkage didn't go to the stop, the idle switch wasn't turned on so the computer didn't know to idle and caused the engine to run rough.Nov 13, 2006 · #1 Starts and runs/idles rough until you accellerate some the it smooths out and runs like it should. The exhaust smells "gassy" like it is running rich. NO codes or SES. Could it possibly be the temp sensor for the ECM - giving it a false reading and the computer is feeding it more gas than it needs? Feb 23, 2006 · this engine runs rough when cold misfires and so on, then when hot while running at higher speeds it backfires through the tbi unit. I changed the plugs and there is no change. It seems as though it shut of an on in a split second as im driving it. this problem happend suddenly and im not sure if it is a cap&rotor or timing chain. Mar 28, 2017 · Engine Size 350 My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. Leaking vacuum hoses replaced 4. Tightened loose spark plug 5. Replaced fuel filter Here is the rest of the story. 1991 GMC TBI 350 sierra stalls bad. I have a 1991 GMC Sierra 350 5.7L. It runs really really rough on start up, when the weather is warner it runs better, not good, just better. I have replaced plugs, wire, pick up coil, ignition coil, rotor and fuel filter. I am stumped on this one, i usually am pretty good at working on vehicles, but i am at ... Mar 28, 2017 · Engine Size 350 My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. Leaking vacuum hoses replaced 4. Tightened loose spark plug 5. Replaced fuel filter Here is the rest of the story. Any advise is appreciated Any advise is appreciated Feb 23, 2006 · Discussion Starter · #1 · Feb 23, 2006. this engine runs rough when cold misfires and so on, then when hot while running at higher speeds it backfires through the tbi unit. I changed the plugs and there is no change. It seems as though it shut of an on in a split second as im driving it. this problem happend suddenly and im not sure if it is ... Jul 06, 2011 · i have an 1988 chevy c2500 350 tbi (365,000 miles on original engine) was running fine started running rough and stalled at idle, determined the fuel injectors went out, replaced fuel injectors and re … read more Mar 28, 2017 · 350. My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. Mar 28, 2017 · 350. My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. Nov 13, 2006 · #1 Starts and runs/idles rough until you accellerate some the it smooths out and runs like it should. The exhaust smells "gassy" like it is running rich. NO codes or SES. Could it possibly be the temp sensor for the ECM - giving it a false reading and the computer is feeding it more gas than it needs? Rough idle chevy 350 We have run scanners and check or change everything we think possible from head gaskets, valve job, exhaust system, computer, icm, throttle body rebuild, changed injectors, new egr valve, fuel pump and. reasons to deny overnight visitation Jun 14, 2019 · i have an 1988 chevy c2500 350 tbi (365,000 miles on original engine) was running fine started running rough and stalled at idle, determined the fuel injectors went out, replaced fuel injectors and re … read more Any advise is appreciated Feb 23, 2006 · Discussion Starter · #1 · Feb 23, 2006. this engine runs rough when cold misfires and so on, then when hot while running at higher speeds it backfires through the tbi unit. I changed the plugs and there is no change. It seems as though it shut of an on in a split second as im driving it. this problem happend suddenly and im not sure if it is ... Mar 28, 2017 · 350. My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. 1 Answer Truck running rough I have a 1989 chevy truck with a 350 tbi motor. Tuned it up with cap, rotor button,plugs. (wires were new last season). The truck still was missing. Checked the ignition coil and thought it was arching. I bought a new coil and installed it. Truck will not start. Jun 22, 2021 · Solution: Check for leaks in the vacuum lines. There might be one or more snapped vacuum lines that you need to fix. Here’s a blog to help you find and fix a vacuum leak in your Chevy 350 TBI. #2. Worn Out Spark Plugs Mostly, bogging is caused due to worn-out spark plugs, especially if you have a habit of revving your car a lot. Nov 22, 2003 · It has a TBI 350 that I just had rebuilt. Stock bore, 9.5:1 pistons, "mild" cam (don't know exact specs), Stock TBI and intake, stock exhaust, stock ignition. I have the timing set at about 10 deg. It idles OK before I hook the ECM back to the distributer but soon as I plug it in, it goes to crap. Won't idle on it's own but runs OK down the road. Mar 28, 2017 · 350. My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. 1992 CHEVY 350 TBI IDLES ROUGH WHEN STARTED.ACTS LIKE IT IS TOO .WANTS TO DIE WHEN PUT IN GEAR AND BLOWS BLACK SMOKE AND - Answered by a verified Chevy Mechanic. We use cookies to give you the best possible experience on our website. ... 87 350 TBI when step on throttle runs rough and blows black.If your chevy gm tbi is running rich this will help you trouble shoot it and fix itDon't Forget to Subscribe today for more fact or fiction, diy ,how to car ... 1991 GMC TBI 350 sierra stalls bad. I have a 1991 GMC Sierra 350 5.7L. It runs really really rough on start up, when the weather is warner it runs better, not good, just better. I have replaced plugs, wire, pick up coil, ignition coil, rotor and fuel filter. I am stumped on this one, i usually am pretty good at working on vehicles, but i am at ... Any advise is appreciated #1 Starts and runs/idles rough until you accellerate some the it smooths out and runs like it should. The exhaust smells "gassy" like it is running rich. NO codes or SES. Could it possibly be the temp sensor for the ECM - giving it a false reading and the computer is feeding it more gas than it needs?1995 Chevy K1500 203K mi. 350 TBI /auto Rough idle & hesitating Everything was good until I stopped at a red light and the idle dropped really low and rough , when the light changed I tried to accelerate but had no power, stumbling and hesitating, felt like I was running out of gas but had almost 1/2 tank.It feels like an old carb with a bad accelerator pump, give it a little gas and it.Mar 23, 2002 · Its really become a part of the family. Anyway, a few weeks ago the truck started running rough when taking off (when you lug it) in either first or reverse. It ildles smooth and runs smooth when... 1995 Chevy K1500 203K mi. 350 TBI /auto Rough idle & hesitating Everything was good until I stopped at a red light and the idle dropped really low and rough , when the light changed I tried to accelerate but had no power, stumbling and hesitating, felt like I was running out of gas but had almost 1/2 tank.It feels like an old carb with a bad accelerator pump, give it a little gas and it.Jun 22, 2021 · Solution: Check for leaks in the vacuum lines. There might be one or more snapped vacuum lines that you need to fix. Here’s a blog to help you find and fix a vacuum leak in your Chevy 350 TBI. #2. Worn Out Spark Plugs Mostly, bogging is caused due to worn-out spark plugs, especially if you have a habit of revving your car a lot. 1 Answer Truck running rough I have a 1989 chevy truck with a 350 tbi motor. Tuned it up with cap, rotor button,plugs. (wires were new last season). The truck still was missing. Checked the ignition coil and thought it was arching. I bought a new coil and installed it. Truck will not start. Jul 29, 2021 · After some research I let the truck warm up to temp, shut the truck off, unplug the ECM wire, and restart the truck Using the timing light I re adjust the timing to the factory 0 degrees to no avail. Compression test just to cover my bases had the readings as follows 1-151 8-124 4-148 3-146 6-145 5-146 7-141 2-152 Any advise is appreciated Jul 13, 2006 · Running rich on a TBI system is usually one of, Too high fuel pressure (not common) bad o2 (common) bad Map sensor or vacuum to it (TBI carboned up in base) (common) bad temp sensor, or most common of all, a bad ground to the temp sensor. It uses the ground that goes to the T/stat housing and they get broken and corroded. 1992 CHEVY 350 TBI IDLES ROUGH WHEN STARTED.ACTS LIKE IT IS TOO .WANTS TO DIE WHEN PUT IN GEAR AND BLOWS BLACK SMOKE AND - Answered by a verified Chevy Mechanic. We use cookies to give you the best possible experience on our website. ... 87 350 TBI when step on throttle runs rough and blows black.If the engine runs 0K, check: Faulty light bulb. CKT 419 open. Gage fuse blown. This will result in no stop lights, oil or generator lights, seat belt reminder, etc. If the engine cranks but will not run, check: Continuous battery-fuse or fusible link open. ECM ignition fuse open. Battery CKT 340 to ECM open. Feb 23, 2006 · Discussion Starter · #1 · Feb 23, 2006. this engine runs rough when cold misfires and so on, then when hot while running at higher speeds it backfires through the tbi unit. I changed the plugs and there is no change. It seems as though it shut of an on in a split second as im driving it. this problem happend suddenly and im not sure if it is ... Mar 28, 2017 · Engine Size 350 My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. Leaking vacuum hoses replaced 4. Tightened loose spark plug 5. Replaced fuel filter Here is the rest of the story. freebitco in next roll predict script Nov 13, 2006 · #1 Starts and runs/idles rough until you accellerate some the it smooths out and runs like it should. The exhaust smells "gassy" like it is running rich. NO codes or SES. Could it possibly be the temp sensor for the ECM - giving it a false reading and the computer is feeding it more gas than it needs? Sep 22, 2016 · So I have an 87 Silverado half ton. 350 TBI with turbo 350 trans. It runs awful until up to operating temp and still lacks power then. it turns over for a few seconds, then has a fluctuating idle until warm, once put in gear the idle speed lowers (no tach so not sure on rpms) and taking off from a stop it bogs out, stalls, sputters etc. 1992 CHEVY 350 TBI IDLES ROUGH WHEN STARTED.ACTS LIKE IT IS TOO .WANTS TO DIE WHEN PUT IN GEAR AND BLOWS BLACK SMOKE AND - Answered by a verified Chevy Mechanic. We use cookies to give you the best possible experience on our website. ... 87 350 TBI when step on throttle runs rough and blows black.Mar 28, 2017 · 350. My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. Mar 23, 2002 · All groups and messages ... ... Jul 13, 2006 · Running rich on a TBI system is usually one of, Too high fuel pressure (not common) bad o2 (common) bad Map sensor or vacuum to it (TBI carboned up in base) (common) bad temp sensor, or most common of all, a bad ground to the temp sensor. It uses the ground that goes to the T/stat housing and they get broken and corroded. Apr 09, 2010 · My 350 TBI in my truck is becoming undriveable with a really bad bog and hesitation/stumble when I try and take off at any rpm or speed. It's pretty much always there, I can get it to behave a bit once I'm moving but that's really only between 20 and 40 mph and that's by hitting the sweet spots. Any advise is appreciated 1992 CHEVY 350 TBI IDLES ROUGH WHEN STARTED.ACTS LIKE IT IS TOO .WANTS TO DIE WHEN PUT IN GEAR AND BLOWS BLACK SMOKE AND - Answered by a verified Chevy Mechanic. We use cookies to give you the best possible experience on our website. ... 87 350 TBI when step on throttle runs rough and blows black.Any advise is appreciated Nov 13, 2006 · #1 Starts and runs/idles rough until you accellerate some the it smooths out and runs like it should. The exhaust smells "gassy" like it is running rich. NO codes or SES. Could it possibly be the temp sensor for the ECM - giving it a false reading and the computer is feeding it more gas than it needs? If your chevy gm tbi is running rich this will help you trouble shoot it and fix itDon't Forget to Subscribe today for more fact or fiction, diy ,how to car ... If the EGR valve is stuck open due to a carbon chip you will notice rough running at idle and low speeds when it is supposed to be closed, but it normally opens at higher speeds. You shouldn't feel it there. Throttle position sensor won't cause this either. At worst it will cause a hesitation or stumble on acceleration. gacha hair blonde Any advise is appreciated Sep 14, 2008 · i have an 1988 chevy c2500 350 tbi (365,000 miles on original engine) was running fine started running rough and stalled at idle, determined the fuel injectors went out, replaced fuel injectors and re … Nov 22, 2003 · It has a TBI 350 that I just had rebuilt. Stock bore, 9.5:1 pistons, "mild" cam (don't know exact specs), Stock TBI and intake, stock exhaust, stock ignition. I have the timing set at about 10 deg. It idles OK before I hook the ECM back to the distributer but soon as I plug it in, it goes to crap. Won't idle on it's own but runs OK down the road. 1995 Chevy K1500 203K mi. 350 TBI /auto Rough idle & hesitating Everything was good until I stopped at a red light and the idle dropped really low and rough , when the light changed I tried to accelerate but had no power, stumbling and hesitating, felt like I was running out of gas but had almost 1/2 tank.It feels like an old carb with a bad accelerator pump, give it a little gas and it.Apr 05, 2012 · Discussion Starter · #1 · Apr 5, 2012. Hello, I own a 1990 chevy 1500 2wd truck it has a tbi 350 that me and my dad rebuilt several years ago sold the truck to brother in law and just bought it back It was running a little rough at first then I had the truck painted and now it has a extremely rough idle. Will cut off in reverse and some at ... Jul 06, 2011 · i have an 1988 chevy c2500 350 tbi (365,000 miles on original engine) was running fine started running rough and stalled at idle, determined the fuel injectors went out, replaced fuel injectors and re … read more Jan 04, 2019 · Throttle body fuel injector pressure is supposed to be 12 psi if you can verify that with a gauge hook up somewhere. You mentioned that you replaced the fuel pressure regulator in the throttle body, but that's not where it's located. The fuel pressure regulator has to be the problem if there's too much pressure. Aug 26, 2009 · Discussion Starter · #1 · Aug 27, 2009 i have a tbi 350 out of a 90 suburban in my jeep. all original harness came out of the suburban and straight into my buggy. it idles rough and acts like its running really rich, then when you take it out to drive it, as soon as you step on it to put a load on, it cuts out and backfires. any ideas? J Joush Hi guys i have a 94 gmc sierra 350 tbi and i have like a little hard start problems when cold but in this video start well... but not so cold in this video ... 1 Answer Truck running rough I have a 1989 chevy truck with a 350 tbi motor. Tuned it up with cap, rotor button,plugs. (wires were new last season). The truck still was missing. Checked the ignition coil and thought it was arching. I bought a new coil and installed it. Truck will not start. Discussion Starter · #1 · Aug 27, 2009 i have a tbi 350 out of a 90 suburban in my jeep. all original harness came out of the suburban and straight into my buggy. it idles rough and acts like its running really rich, then when you take it out to drive it, as soon as you step on it to put a load on, it cuts out and backfires. any ideas? J JoushMar 28, 2017 · 350. My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. Sep 14, 2008 · i have an 1988 chevy c2500 350 tbi (365,000 miles on original engine) was running fine started running rough and stalled at idle, determined the fuel injectors went out, replaced fuel injectors and re … Rough idle chevy 350 We have run scanners and check or change everything we think possible from head gaskets, valve job, exhaust system, computer, icm, throttle body rebuild, changed injectors, new egr valve, fuel pump and. reasons to deny overnight visitation Discussion Starter · #1 · Aug 27, 2009 i have a tbi 350 out of a 90 suburban in my jeep. all original harness came out of the suburban and straight into my buggy. it idles rough and acts like its running really rich, then when you take it out to drive it, as soon as you step on it to put a load on, it cuts out and backfires. any ideas? J JoushIf your chevy gm tbi is running rich this will help you trouble shoot it and fix itDon't Forget to Subscribe today for more fact or fiction, diy ,how to car ...Feb 17, 2020 · Discussion Starter · #1 · Feb 17, 2020 1991 K5 TBI 350 with SM465. One out of five times the idle will seem to fall out when taking it out of gear and coming to a stop. It feels like a misfire. It will correct itself after about 5 seconds, can usually correct it a little quicker by revving. Jul 29, 2021 · After some research I let the truck warm up to temp, shut the truck off, unplug the ECM wire, and restart the truck Using the timing light I re adjust the timing to the factory 0 degrees to no avail. Compression test just to cover my bases had the readings as follows 1-151 8-124 4-148 3-146 6-145 5-146 7-141 2-152 Discussion Starter · #1 · Aug 27, 2009 i have a tbi 350 out of a 90 suburban in my jeep. all original harness came out of the suburban and straight into my buggy. it idles rough and acts like its running really rich, then when you take it out to drive it, as soon as you step on it to put a load on, it cuts out and backfires. any ideas? J JoushMar 23, 2002 · All groups and messages ... ... If the engine runs 0K, check: Faulty light bulb. CKT 419 open. Gage fuse blown. This will result in no stop lights, oil or generator lights, seat belt reminder, etc. If the engine cranks but will not run, check: Continuous battery-fuse or fusible link open. ECM ignition fuse open. Battery CKT 340 to ECM open. Jul 24, 2016 · On the vortec 350 you need at least 60 PSI of pressure from the fuel pump or it won't even start. Have you considered a torque converter problem causing the stalling? M Makr Registered Joined Aug 17, 2016 4 Posts #18 · Aug 17, 2016 I suppose if it won't idle in neutral it can't be the torque converter xPosTech Registered Joined Nov 19, 2010 Mar 28, 2017 · 350. My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. It will start normal then start like a out of time miss.. then if you try to throttle up any.. it backfires and stumbles.. and then after about 1 min of running.. it clears up and acts normal! Good fuel pressure.. recent tune up.. new ignition module.. dont want to throw much more at it without more concrete ideas.. there are no dtc's either...Apr 17, 2019 · After the 10 seconds of fuel pump priming, it starts right up but immediately runs very rough where the engine, tailpipes and doors shake if open. The exhaust sort of flutters out the tailpipes and smells very much like un-burnt gas or as if it is running rich. Sep 22, 2016 · So I have an 87 Silverado half ton. 350 TBI with turbo 350 trans. It runs awful until up to operating temp and still lacks power then. it turns over for a few seconds, then has a fluctuating idle until warm, once put in gear the idle speed lowers (no tach so not sure on rpms) and taking off from a stop it bogs out, stalls, sputters etc. Feb 23, 2006 · Discussion Starter · #1 · Feb 23, 2006. this engine runs rough when cold misfires and so on, then when hot while running at higher speeds it backfires through the tbi unit. I changed the plugs and there is no change. It seems as though it shut of an on in a split second as im driving it. this problem happend suddenly and im not sure if it is ... Mar 28, 2017 · 350. My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. Mar 23, 2002 · All groups and messages ... ... Feb 23, 2006 · Discussion Starter · #1 · Feb 23, 2006. this engine runs rough when cold misfires and so on, then when hot while running at higher speeds it backfires through the tbi unit. I changed the plugs and there is no change. It seems as though it shut of an on in a split second as im driving it. this problem happend suddenly and im not sure if it is ... Nov 22, 2003 · It has a TBI 350 that I just had rebuilt. Stock bore, 9.5:1 pistons, "mild" cam (don't know exact specs), Stock TBI and intake, stock exhaust, stock ignition. I have the timing set at about 10 deg. It idles OK before I hook the ECM back to the distributer but soon as I plug it in, it goes to crap. Won't idle on it's own but runs OK down the road. Apr 05, 2012 · Also has a small miss it seems at a idle and is idled high to my ear truck does not have a tach. so here is what I have done 1. Complete tune up all plugs/wires/rot/button/filters 2. Have changed all vacuum lines 3. EGR sensor 4. Rebuilt the entire TBI all new gaskets and o rings. Feb 23, 2006 · this engine runs rough when cold misfires and so on, then when hot while running at higher speeds it backfires through the tbi unit. I changed the plugs and there is no change. It seems as though it shut of an on in a split second as im driving it. this problem happend suddenly and im not sure if it is a cap&rotor or timing chain. Mar 28, 2017 · 350. My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. Feb 23, 2006 · this engine runs rough when cold misfires and so on, then when hot while running at higher speeds it backfires through the tbi unit. I changed the plugs and there is no change. It seems as though it shut of an on in a split second as im driving it. this problem happend suddenly and im not sure if it is a cap&rotor or timing chain. Feb 23, 2006 · Discussion Starter · #1 · Feb 23, 2006. this engine runs rough when cold misfires and so on, then when hot while running at higher speeds it backfires through the tbi unit. I changed the plugs and there is no change. It seems as though it shut of an on in a split second as im driving it. this problem happend suddenly and im not sure if it is ... Mar 23, 2002 · All groups and messages ... ... There is a switch in the throttle position sensor that is supposed to be triggered when the throttle lever goes to idle to tell the computer to idle. But since the linkage didn't go to the stop, the idle switch wasn't turned on so the computer didn't know to idle and caused the engine to run rough.1991 GMC TBI 350 sierra stalls bad. I have a 1991 GMC Sierra 350 5.7L. It runs really really rough on start up, when the weather is warner it runs better, not good, just better. I have replaced plugs, wire, pick up coil, ignition coil, rotor and fuel filter. I am stumped on this one, i usually am pretty good at working on vehicles, but i am at ... Any advise is appreciated Mar 23, 2002 · All groups and messages ... ... Any advise is appreciated If the engine runs 0K, check: Faulty light bulb. CKT 419 open. Gage fuse blown. This will result in no stop lights, oil or generator lights, seat belt reminder, etc. If the engine cranks but will not run, check: Continuous battery-fuse or fusible link open. ECM ignition fuse open. Battery CKT 340 to ECM open. Jun 14, 2019 · i have an 1988 chevy c2500 350 tbi (365,000 miles on original engine) was running fine started running rough and stalled at idle, determined the fuel injectors went out, replaced fuel injectors and re … read more Discussion Starter · #1 · Aug 27, 2009 i have a tbi 350 out of a 90 suburban in my jeep. all original harness came out of the suburban and straight into my buggy. it idles rough and acts like its running really rich, then when you take it out to drive it, as soon as you step on it to put a load on, it cuts out and backfires. any ideas? J JoushFeb 23, 2006 · Discussion Starter · #1 · Feb 23, 2006. this engine runs rough when cold misfires and so on, then when hot while running at higher speeds it backfires through the tbi unit. I changed the plugs and there is no change. It seems as though it shut of an on in a split second as im driving it. this problem happend suddenly and im not sure if it is ... Any advise is appreciated Mar 28, 2017 · 350. My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. Aug 26, 2009 · Discussion Starter · #1 · Aug 27, 2009 i have a tbi 350 out of a 90 suburban in my jeep. all original harness came out of the suburban and straight into my buggy. it idles rough and acts like its running really rich, then when you take it out to drive it, as soon as you step on it to put a load on, it cuts out and backfires. any ideas? J Joush Jul 24, 2016 · On the vortec 350 you need at least 60 PSI of pressure from the fuel pump or it won't even start. Have you considered a torque converter problem causing the stalling? M Makr Registered Joined Aug 17, 2016 4 Posts #18 · Aug 17, 2016 I suppose if it won't idle in neutral it can't be the torque converter xPosTech Registered Joined Nov 19, 2010 Mar 28, 2017 · 350. My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. Apr 05, 2012 · Discussion Starter · #1 · Apr 5, 2012. Hello, I own a 1990 chevy 1500 2wd truck it has a tbi 350 that me and my dad rebuilt several years ago sold the truck to brother in law and just bought it back It was running a little rough at first then I had the truck painted and now it has a extremely rough idle. Will cut off in reverse and some at ... Mar 23, 2002 · All groups and messages ... ... Sep 14, 2008 · i have an 1988 chevy c2500 350 tbi (365,000 miles on original engine) was running fine started running rough and stalled at idle, determined the fuel injectors went out, replaced fuel injectors and re … Any advise is appreciated 1991 GMC TBI 350 sierra stalls bad. I have a 1991 GMC Sierra 350 5.7L. It runs really really rough on start up, when the weather is warner it runs better, not good, just better. I have replaced plugs, wire, pick up coil, ignition coil, rotor and fuel filter. I am stumped on this one, i usually am pretty good at working on vehicles, but i am at ... Any advise is appreciated Nov 13, 2006 · #1 Starts and runs/idles rough until you accellerate some the it smooths out and runs like it should. The exhaust smells "gassy" like it is running rich. NO codes or SES. Could it possibly be the temp sensor for the ECM - giving it a false reading and the computer is feeding it more gas than it needs? There is a switch in the throttle position sensor that is supposed to be triggered when the throttle lever goes to idle to tell the computer to idle. But since the linkage didn't go to the stop, the idle switch wasn't turned on so the computer didn't know to idle and caused the engine to run rough.Apr 22, 2010 · Corpus Christi, TX Apr 22, 2010 #7 I'm fairly certain that it was raw fuel since the exhaust started burning my eyes. It was wet and soot was hitting the wooden fence as well. I suppose it could be some condensation. Like I said, the odd thing is that it ran fine when I first started it and it could be reved normally and everything. Jul 24, 2016 · On the vortec 350 you need at least 60 PSI of pressure from the fuel pump or it won't even start. Have you considered a torque converter problem causing the stalling? M Makr Registered Joined Aug 17, 2016 4 Posts #18 · Aug 17, 2016 I suppose if it won't idle in neutral it can't be the torque converter xPosTech Registered Joined Nov 19, 2010 Any advise is appreciated Feb 23, 2006 · Discussion Starter · #1 · Feb 23, 2006. this engine runs rough when cold misfires and so on, then when hot while running at higher speeds it backfires through the tbi unit. I changed the plugs and there is no change. It seems as though it shut of an on in a split second as im driving it. this problem happend suddenly and im not sure if it is ... Mar 23, 2002 · All groups and messages ... ... Mar 23, 2002 · All groups and messages ... ... Feb 17, 2020 · Discussion Starter · #1 · Feb 17, 2020 1991 K5 TBI 350 with SM465. One out of five times the idle will seem to fall out when taking it out of gear and coming to a stop. It feels like a misfire. It will correct itself after about 5 seconds, can usually correct it a little quicker by revving. Mar 28, 2017 · Engine Size 350 My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. Leaking vacuum hoses replaced 4. Tightened loose spark plug 5. Replaced fuel filter Here is the rest of the story. Mar 28, 2017 · 350. My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. Mar 23, 2002 · All groups and messages ... ... Jan 04, 2019 · Throttle body fuel injector pressure is supposed to be 12 psi if you can verify that with a gauge hook up somewhere. You mentioned that you replaced the fuel pressure regulator in the throttle body, but that's not where it's located. The fuel pressure regulator has to be the problem if there's too much pressure. Feb 23, 2006 · Discussion Starter · #1 · Feb 23, 2006. this engine runs rough when cold misfires and so on, then when hot while running at higher speeds it backfires through the tbi unit. I changed the plugs and there is no change. It seems as though it shut of an on in a split second as im driving it. this problem happend suddenly and im not sure if it is ... Mar 23, 2002 · All groups and messages ... ... Mar 28, 2017 · 350. My 350 TBI is running very rough. I have repaired a few things: 1. Leaking intake gasket (Leaking oil from the valley) 2. EGR solenoid replaced (Hose was connected to vent. Hose barb was broken) 3. Mar 23, 2002 · All groups and messages ... ... Any advise is appreciated If the engine runs 0K, check: Faulty light bulb. CKT 419 open. Gage fuse blown. This will result in no stop lights, oil or generator lights, seat belt reminder, etc. If the engine cranks but will not run, check: Continuous battery-fuse or fusible link open. ECM ignition fuse open. Battery CKT 340 to ECM open. Apr 05, 2012 · Discussion Starter · #1 · Apr 5, 2012. Hello, I own a 1990 chevy 1500 2wd truck it has a tbi 350 that me and my dad rebuilt several years ago sold the truck to brother in law and just bought it back It was running a little rough at first then I had the truck painted and now it has a extremely rough idle. Will cut off in reverse and some at ... calais maine free housexa