350 tbi rough idle

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350 tbi rough idle

It will run Suburban: Rough Idle At Cold Start - My 2002 Chevy Suburban 2500 idles very rough when starting for the first time in the morning. I'm having trouble getting it to idle below 1000 rpm. I pulled the tan wire tried to set it at 0 degrees but it wont idle there i have it set about 6 to 8 degrees so it would run Hi i have a 94 chev k1500 350 tbi. Smooths out at throttle, but produces gray smoke that irritates the eyes. the object to this thread is to make a some what of a check list of everything that can / has caused a idle issues/ surge and a mis fire i dont need the entire story, just what fixed the issue i have noticed latly there is a asssss load of threads about mis/rough idle. Set timing with light after disconnecting wire at dash and again timed to 0. To increase idle rpm the ECM moves the IAC valve out allowing more air to pass by the throttle plate. - o2 sensor code 44 (lean) Replaced: coolant temp sensor, tps, map sensor, fuel filter, and o2 sensor. It will idle around 550rip'ems but it's pretty rough. 6:37. 0 L throttle body and am having some engine problems recently. It will go from very21/5/2010 · 1--I believe he ment IAC--idle air control motor---. Motor does idle but very lumpy, between 500rpm anf 800rpm. (Let me try again. com. 7L Gen 0 Engine at Amazon. Alot cleaner though with more dress up. All sensors are tested and verified, all tune up parts are new. com Find helpful customer reviews and review ratings for Genuine GM (10067353) 350ci / 5. com, PhoenixMuscleCar. Replaced fuel filter Here is the rest of the story. should all be TBI systems. I set the timing by ear (got it to where it ran much better) but it still has this crazy erratic idle. But after a little while the idle starts surging. I rebuilt my throttle body with a kit from Ebay and it cured both problems. all original harness came out of the suburban and straight into my buggy. One of the local board members is the parts manager at a local Chevy dealer so I got luckier with the price but your right, it was a quick , easy fix. com FREE DELIVERY possible on eligible purchases18/5/2013 · The Boating Forum - mercruiser 5. 7 V8 alpha won't idle - will start fine at 1/4 throttle or more but anything below that, it will cut off. Discuss 1990 TBI 5. " "Check out some good options for engine swps in your Jeep, such as the Chevy 350 TPI, Vortec, Ford Liter, and more in Christian Hazel's article Engine Swaptions!" "Chevy 350 TBI V8. So, We ended up having to replace as follows: EGR Valve Throttle Position Sensor Coolant Temp Sensor Refurbished the TBI Idle air Control valve o2 Sensor Air Filter New plugs, Wires, Cap, Rotor Rough idle but otherwise ru Rough idle but otherwise runs fantastic if its a 350 tbi then it could be the idle air control sensor. No trouble codes ever show up and my check engine light stays off. my 86 was doing the same thing, a buddy of mine told me that the fuel filter was probably plugged. plus it labors when in gear. hello, I've got an 89 350 tbi chevy that has a misfire. Broken o-ring on Spider Fuel Injector. "Chevy 350 TBI Alot cleaner though with more dress up. May 21, 2017 I've had a rough idle problem with the Chevy 350 engine in the van and In the process, I happened to notice the TBI's throttle was not closing Rough idle but otherwise runs fantastic . Anyway, we have been chasing a rough idle ever since we got it. 7 tbI I have replaced every sensor on motor had igniton timing Asked by coyboy350 Jan 05, 2015 at 10:20 PM about the 1994 . 7 350 TBI. This has TBI. Sbc Chevy 350 5 7l 80 86 Stg 4 Master Engine Rebuild Kit Performance Rough Idle. I own a 1987 Chevrolet R10 pickup with a 5. at a rough idle, the stock can will “dither” in and out in response to the rapidly-changing manifold vacuum, constantly varying the amount of vacuum advance, which creates an unstable idle. Very easy to mount with one piece of flat steel and a couple of holes. Both will enrich. It is SBC 350 with TBI. Swift Automobile pdf manual download. code 12 and 45 are present still have no clue of why it floods right off idle but runs fine at any other throttle angle# 92 Chevy K1500 350 TBI idling problems in a rough idle problem on a V6 TBI and it was due to a bad throttle positioning sensor causing it to run rich at idle. Data logged, on the rough idle start I have noticed a couple things, the IAC is almost closed during the bad idle and when it begins to open the idle smooth out. Low $ fix - compared to what you've got in it so far. I tihnk the kit cost me $35 or something and the truck ran alot better afterward. Swift Suzuki. 89 Throttle body 350 rough idle and hesitation I don't have a meter to check the tps but i did the sensor off of another tbi truck that was running perfectly just 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 … had a 94 305 TBI which on the odd occasion would start running rough, did the same cap rotor swap still ran rough, checked codes, reset timing, finally by fluke I noticed one of the vaccum hoses came off of the egr valve (Not sure if its a valve as it was a plastic box on the passenger side of manifold next to TB), plugged it back in nice idle Hi i have a 94 chev k1500 350 tbi. I have a 1990 K1500 5. I set the idle speed with it on at 2500 rpm on gasoline. If the engine idle changes, the problem is an intake gasket. Also when the truck is about to die the vacuum drops way down (14-15). Leaking intake gasket (Leaking oil from the valley) 2. For whatever reason you have determined that you need to adjust your base idle on your GM TBI vehicle. i have read that it could be the fuel pump (small connecting hose The sub is a 350 TBI, it idles rough, almost like it's running out of fuel and coming off lights it will stall out. i have put a new regulator,iac vavle,plugs, wires, cap,o2 sesor in. Problem is when I first start the truck in the morning (or after sitting awhile) and go to take off, it will chug, bog out, or barely go for a few seconds, then snap out of it and run fine. My old beater's back to running like a dog and this time it's got me stumped. I started by replacing the spark plugs and wires, coolant sensor, and tps. Sometimes when i am crawling around a parking lot my truck will randomly surge and then the idle is much smoother. 7L Gen 0 Engine: Long - Amazon. The TBI installation doesn't say to set the timing so I assumed I should leave it the way it was. I just bought this machine, it wouldnt even idle so I cleaned the carb and reassembled it, cleaned the tank, replaced the fuel line and set the carb to the initial settings per my manual. 1992 buick roadmaster 350 TBI 118k miles. 152. The rough idle smooths out after about 3 min, but when i plug in the block heater over night it starts and idles fine. Starting with the engine at idle, slowly increase engine speed to 3,000 RPM, engine vacuum should be equal to or higher than idle vacuum at 3,000 RPM. I have a 1987 chevy v10 350 TBI. Let me use an idle complaint that had me on the ropes as an example. 94 5. for PhoenixEngine. FYI my 89 sierra has 350 tbi with heddman hedders w/o 02 bung. Read honest and unbiased product reviews from our Buy Genuine GM (10067353) 350ci / 5. it will run while fluttering the pedal but that is all. That is the disadvantage of tbi as opposed to individual port injection. com is a division of Guaranteed Carburetors of Largo, Florida. Low idle slight stutter - 94 5. did you have the fuel pressure checked> the low idle or stalling could be the result of a dirty throttle body. Car runs and idles fine when it is cold. put three tps sensors in it and rebuilt throttle body. One rev up and it clears the white ice ok. Semi-synthetic have minute polymers inside them that decrease engine weathering and aid safeguard the engine from chilly harm as well as cold-starts. 1995 Silverado, 2wd Air, 5. If the engine idles OK after clearing fuel trim, check the closed throttle switch in the Idle Speed Control (ISC) motor. clean the plate of all the carbon debris with a rag with a cleaner. Search this Forum: . was this reset properly( with it removed did you push on the pintle in a cicular motion to bring it closer to THIS IS A CATALOG LISTING FOR OUR ENGINES: CLICK ON A PHOTO TO OPEN EACH PAGE. I have a 1987 Chevy K5 Blazer the engine runs and idles rough does not want to idle in drive, The odd-fire design cause a the engine to idle a bit rough. that's the good side of something going wrong, you end up learning alot about it. I measured the fuel pressure at 12 psi which is exactly what the Howell recomends. Any TBI experts here care to put in their $0. New plugs,cap, rotor ICM,wires. 0l 305 5. 7l 87-95 Tbi Stage 2 Camshaft Pistons. It seems if the butterfly is closed and not open enough to begin with, the ecm will never find the correct idle. low idle problem 350 TBI from Holley online for $1000,check the TPS,coolent temp sensor and the map sensor,will it run below a 1000 just rough maybe a ingnition I am helping a friend build a mud racing truck: 87' tbi 350. I had one go on my 454ss TBI and the truck would start, idle + drive for short periods and then die. E-350 6. 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 Best Answer: a 350. Tuning Your MegaSquirt-II™ (or MicroSquirt®) Controller. 1995 chevy tahoe just rebuilt 383 stroker kit w z 28 heads a mild comp cam now I have a rough idle surges cams have been known to mess with the map sensor, good chance you have this problem I have an 89 S15 4x4 4. . EFI Idle Tuning Notes I finally achieved, what I consider, an excellent idling enginebut it wasn't easy. If you are not familiar with tuning EFI systems, you might want to review the material in the Principles MS1-Extra Tuning manual (TunerStudio version) Only for use with the MS1 Extra code (MS1 - 68H908 based microprocessors)rough idle, stalling, loss of power. rough idle, stalling, loss of power. My idle is rough anytime the truck is in drive. Vacuum Leak Around Spider Assembly. high idle with a 350 TBI When it's sat for a while and I start the engine, it idles at about 1200rpm for the first couple of minutes, then drops down to about 900rpm, and a little while after that drops down to 6-700rpm where it idles at when warm. In most cases this is only done if you have modified the internals of your engine or you have swapped a larger throttle body onto your vehicle. Here's the story. treatedView and Download Suzuki Swift user manual online. Home; Classifieds Forum FAQ Search Memberlist Usergroups Calendar Register : Profile Album Log in to check your private messages Log in: Album Log in to I had the same problem a local board recommended the same fix. 350 tbi rough idleRough idle but otherwise runs fantastic . 2 Hesitation & Stumble. 7L TBI - Rough Idle/Stalling. The relay allows full fuel pressure until an oil pressure signal is detected - if none detected it shuts the engine off by killing the pump. I put it back on the road last fall after sitting about 2 years. got to grandma's house 10 minutes away and as i pulled in the driveway the car idled with a noticeable shake. Hard to start oil enters throttle body through the crankcase breather hose smokes bad. 0 powerstroke I had the egr valve replaced 1yr ago. Tightened loose spark plug 5. trucks. Got a 1990 Chevy CK 350. 1988 Chevy pick up 350 tbi ran fine at first then started to idle fast then stalled when you put it in gear it got harder to get it to start then one day it wouldn't start any more what could it be? I have a home made billet 4bbl tbi I'm testing. 0L TBI rough running - posted in General Engine (Non-Gen Specific): I have a 88 Formula 5. effects trans lockup and jolts truck. EGR solenoid replaced (Hose was connected to vent. a. and a few others. i have a tbi 350 out of a 90 suburban in my jeep. little high for idle rpm on a 350. The truck has 190K miles on it and runs fine other than a misfire. It performs much the same function as any electronic throttle: to control the amount of air going into the engine so the computer can match it with the right amount of fuel. It idles a little rough at 1,000 RPMs but is very smooth above that. I Checked For Vacuum Leaks Already. It will idle slowly when cold, and will come up to where you set it as the engine warms up. My 1991 Chevy Silverado starts up ok, but has a rough idle until it warms up. I had a slightly high idle problem and a rough idle at times. Best Answer: a 350. If you are not familiar with tuning EFI systems, you might want to review the material in the Principles MS1-Extra Tuning manual (TunerStudio version) Only for use with the MS1 Extra code (MS1 - 68H908 based microprocessors)MegaManual Index-- Injector Selection-- Pulse Width Modulation-- The Flyback Board-- Injector Resistors Injector Bungs and Fuel Rails-- Throttle Bodies--Fuel Supply If you are not familiar with tuning EFI systems, you might want to review the material in the Principles of Tuning page before reading this web page. MechanicAdvice) submitted 3 years ago by jleavesl I'm going to preface this by saying that I work out of town and am not near the truck most of the time. WHen you open the throttle, its not quite as bad, but at idle it looks like it is puddling up (turning from a fine spray to droplets) 1996 Chevy G30 Cargo Van 350 TBI. This is a discussion on 1987 Chevy 350 idles & runs rough within the Automotive Support forums, part of the Tech Support Forum category. My 89 GMC 2500 has a TBI 350 in it with 223,xxx miles. The car will have less power and just generally run pretty rough until it warms up in about three minutes. The idle rpm is programmed into the PROM. 1996 Chevy G30 Cargo Van 350 TBI. From your description, the first thing I would look at is the Mass Airflow Sensor (MAF). Runs fine for about 5 minutes then begins rough idle, and belching mostly black smoke with an occasional touch of blue. Best Street Deal! For applications with carb. 3 262 V6 TBI The truck was running rough idling bad and blowing a white/blue smoke. checked tps voltage at the ecu pins and at idle it is a round five volts and it goes up to 4. It hits the throttle plates and turns back to liquid somewhat. I have repaired a few things: 1. Up to 230hp engines that air flow is fine. Data disappeared!) As some of you 1995 TBI 350 with 214k stumbles a little at idle, otherwise runs great rotor, coil, 02 sensor), but the rough idle wasn't cured by the tune-up. The vehicle ran perfectly as long as it wasn't idling. Page 1: Rough Idle After Installing a New Spider Fuel Injector. i'm about to give up. I have to pres accelerator to start it, there is black smoke, very noticeable gasoline odor, rough idle and it often die on D or R. 1988 w100 tbi 318. I've got a rough idle that evens out when you put your foot into it. 5L TBI rough idle The problem is that I have a rough idle when I start it up, but it doesn't stumble during acceleration. It is a 91 chevy truck with the 350 (5. 1995 chevy tahoe just rebuilt 383 stroker kit w z 28 heads a mild comp cam now I have a rough idle surges cams have been known to mess with the map sensor, good chance you have this problem Van’s Chevy 350 Engine Rough Idle Problem Solved and a Hike Posted on May 21, 2017 by Bob Saturday May 20, 2017 Troy Oregon Working on the rough idle problem When we were in town yesterday I purchased a new PCV valve for the van’s engine. I don't see any vaccum lines disconnected. Van’s Chevy 350 Engine Rough Idle Problem Solved and a Hike Posted on May 21, 2017 by Bob Saturday May 20, 2017 Troy Oregon Working on the rough idle problem When we were in town yesterday I purchased a new PCV valve for the van’s engine. Engine Idle Is Too Low Or Stalls Dirty Throttle Body. 7 tbI I have replaced every sensor on motor had igniton timing redone. It's rough enough that it'll shake the whole truck while it's running, but it still sounds regular but rough. When you first start it up the engine will idle high and then drop down to regular idle speed. If it's too high, you'll flood the engine (especially at idle). 8. Veh will idle very rough and has stalled while driving. Hard Starting. Fill a spray bottle with water and spray all around the intake. 1987 chevy truck 350 tbi stumbles sometime will die right off idle. neighbor just bought a similar Chevy at an auctionsame rough idle issue (~110000mi)But the stable idle won't last long, it'll idle low and rough. A great replacement mild street engine with a mild to rough idle. I was under the impression that a 70's omc v6 or v8 wad considered an OMC 800 series. couple weeks ago i went out to pick the kids up. This version of the engine and parts from these Jeeps can be used to swap a Buick V6 into your Jeep. it has a very rough idle and is running very rich, shakes like heck under 1200 rpm. cold air intake, headers the works. Sorry for the long post Replacement Idle Air Control (IAC) Motor for Sniper EFI TBI Systems, Sniper 90/92/102mm Throttle Bodies, Terminator TBI, Avenger 4bbl TBI, HP 4bbl TBI, Commander 950 & Digital Pro-Jection Systems. Should I replace again or clean? I would like to perform this task myself. Right now with the 1995 350 engine, the idle BLMs are on the rich side. 5 liters TBI engines, the throttle body intake fuel rail pressure better be 14. If The Chevy 6. Lunati voodoo 60102 cam, headers, base timing at 4 deg, roller 1. 1980 Chevrolet Blazer with new 350 330 hp with vortec heads gm performance motor 12486041 I have a eddlebrock thunderseries carb I am getting black spark plugs and rough idle is it timing plugs both? The least expensive online catalog for all your 1993 Chevy 350 Engine needs. When applied a slight acceleration its hesitant and bucks. I have a 1989 chevy c1500 350 tbi. If I unplugged that tan wire w/black stripe, it wouldn't die. I have a 89 chevy surburban 350 tbi it has a real low chopy idle and stalls I put new plugs wires cap rotor in it I put seafoam fuel cleaner in it also its running We bought an '89 Chevy K1500 with a 350 in it and 224k miles, with the nasty Getrag trans I knew nothing about until after purchasing the truck. Vacuum leak from spider injector o-ring. Find Summit Racing® Stage 1 Intake Manifolds SUM-226018 and get Free Shipping on Orders Over $99 at Summit Racing! Our Summit Racing® Stage 1 intake manifolds are Thanks for all the help. It basically smells like a snow blower with the choke all the way on. I Have A 1994 K1500 350 Tbi And Have Been Chasing A Problem With 1995 Chevy Silverado Lifted 1995 Chevy Silverado Map Sensor Silveradosierra Rough Idle After Camshaft Manufacturers Description: rough idle, upgraded cylinder heads and valvetrain required, headers and aft cat exhaust required, 11. While your engine is getting more air (vacuum leak) and this little bit of fuel that is being dumped at idle is not enough to creat proper combustion, and could cause your rough running condition. Forum FAQ Search Memberlist Usergroups Calendar Register : Profile Album Log in to check your private messages Log in: Album Log in to Posted by Rick from Paso on January 07, 2004 at 18:45:09 from (63. It does it sometimes at idle when cold and does it just going down the road at 40-45mph when it gets into overdrive and is running in the 1500RPM range. Nov 22, 2017 1989 suburban tbi 350 initial cold start runs rough. For the 2. Master Engine Rebuild Kit Sbc Chevy 350 5. Average Reported Mileage: 40395 Tests/Procedures: 1. All TBI assemblies are flow bench tested, calibrated and idle adjusted which makes for easy installation. The ECM controls idle rpm with the IAC (idle air control) valve. Wit the EIC wire disconnected (or connected) my truck won't start unless I set timing about 20 degrees advanced, once started I can just barely get it down to 0 BTDC, it will idle rough, but I can do it. 0powerstroke egr valve replacement instructions [ 2 Answers ] I have a 2004 E350 superduty w-6. 7 Idle surging,stalling in the alt. My '89 350 TBI truck would fire up and then immediately die when the idle went any lower than 1000 rpm's after changing the plugs, wires, rotor & cap. We’ve all seen chrome, and billet, and more Registration page for all known 1984 Jeep Scramblers in existence. Rough idle, the problems started in the fall when the temp droped and as it gets colder the rougher the idle is and have to give it gas just to keep it running. toggle menu. Takes the guesswork out of what is going on, sometimes the computer is trying to compensate for a bad sensor reading. 1980 Chevrolet Blazer with new 350 330 hp with vortec heads gm performance motor 12486041 I have a eddlebrock thunderseries carb I am getting black spark plugs and rough idle is it timing plugs both? Re: OMC Chevy 350 Rough Idle Hey and thank you for your post. Hose barb was broken) 3. 350 TBI, 4L60E Removing Idle Stop Cap from a GM TBI and Adjusting the Idle Set Screw. code 12 and 45 are present still have no clue of why it floods right off idle but runs fine at any other throttle angle# '91 Chevy 350 TBI surging at idle and stumbling at speed Howdy - My father in law's '91 Chevy was running poorly, so we put new plugs, wires, cap and rotor on it, and it's running better, but it it still surging at idle. 1995 Chevy K1500 203K mi. Ford351W—350-354HP FORD 351W — 360-365 HP Midnight TURNKEYCrate Engine TURNKEY ENGINE ID #Ford-04. if its a 350 tbi then it could be the idle air control sensor. i just installed a 89 chevy tbi in an 84 chevy crew cab. The rough idle smooths out after about 3 min, but when i plug in the block heater over night it starts We bought an '89 Chevy K1500 with a 350 in it and 224k miles, with the nasty Getrag trans I knew nothing about until after purchasing the truck. Well, it didn't seem to idle rough until a few weeks after we bought it haha. 5+ compression ratio advised, low ratio gearing required, auto trans w/3200- 3600 stall converter, com New Posts Hot Thread (New) Hot Thread (No New) No New Posts Contains Posts by You Locked Thread. 350/SBC Runs rough when warm - Need help Drivetrain & Performance 350/SBC Runs rough when warm - Need help - Chevy Nova Forum Steve's Nova Site is an automotive enthusiast website dedicated to the 1962 - 1979 Chevrolet Nova, Chevy II and Acadian automobiles. The is very fuel inefficient, since a larger throttle opening at idle (set by the idle speed screw) is needed allow extra fuel in to keep the engine idling. See our Intake manifolds - Chevy. WHen you open the throttle, its not quite as bad, but at idle it looks like it is puddling up (turning from a fine spray to droplets) Surging idle can be caused by a number of different problems. IAC Idle air control valve cleaning 87-95 TBI 305 350 Sierra Silverado Caprice Take out the iac valve, clean the nasty gunk off the part that moves in and out, dry, make a new gasket, reinstall. In fact, I believe the Holley HP/Dominator ECU is more sensitive to idle tuning (idle algorithm), than the Commander 950 is; meaning it's easier to achieve a good idle with the C950. The fuel puddling is normal for a TBI. If the idle is low and inconsistent, it may be due to an issue with your idle control valve. It idled 1992 buick roadmaster 350 TBI 118k miles. Started and ran a little rough but not bad. You can find that on the top left rear side of the TBI housing. I have a 90 chevy 1500 witha 350 tbi crate motor in it it only has 30k miles on the engine it has edelbrock headers vavles valve covers, accel tbi and other minor mods, i want to put a camshaft in but not so sure what all i need and what the better application would be, i want something that i can still drive everyday but take to the track every now and then, but i love that rough idle sounds I Checked For Vacuum Leaks Already. Low idle slight stutter 23 Answers. If you are not familiar with tuning EFI systems, you might want to review the material in the Principles MS1-Extra Tuning manual (TunerStudio version) Only for use with the MS1 Extra code (MS1 - 68H908 based microprocessors)Tuning Your MegaSquirt-II™ (or MicroSquirt®) Controller. Rough idle on cold weather start I have a 91 GMC 2WD 350/TBI with 135,000 miles. in winter (not my daily, so haven't bothered chasing down high idle with IAC connected). I've replaced the fuel filter. 7 rough idle quadride100. if clogged with carbon or Chevy 350 5. See if the engine now idles OK. 7L 350, TBI, Auto, 220Kmiles Its been a great truck, for the most part it runs and drives great! but at low idle or low rpm's it missis,sputters,surges and if im just barely giving it any gas it almost wants to stall out. Re: 87 Chevy 350 TBI low Idle issue I had the same problem you described many years ago with my 87 350 FI 4x4 and after two mechanics played with everything with no results, I took it over and left it at the GM tech school and they found that the distributor shaft had become demagnitized. Sorry for all the posts but i have more updates! I ran her at idle yesterday, took off the air cleaner, and sprayed carb cleaner into the fuel bowl tube in short squirts. On models that have no idle air control motor there is a small machined opening on on the throttle body that prevents the throttle plate from completly closing. 1987 Chevrolet Truck rough running 350 tbi. Chevy 305 327 350 400 Cam Lifters Springs Kit Streetstrip Rough Idle 234244. 1993 Chevy 350 Engine Typically, mineral oil is the normal oil that oils your engine, yet calls for constant transforming. Working on the rough idle problem. Aside from high idle issues, low idle and even sporadic stalling can both be attributed to a bad idle control valve. 7L 350 TBI Surging/Sputtering/Missing Chevy Tech. 3 liter S10 idle problem? So when I start it up it idles from 1500 to 2000 rpms in park or neutral. ThrottleBodyInjection. 1990 chevy truck 350 tbi runs rough at idle up and down and exhaust stinks bad, bad gas milage too - Answered by a verified Chevy Mechanic. 3. If you are not familiar with tuning EFI systems, you might want to review the material in the Principles MS1-Extra Tuning manual (TunerStudio version) Only for use with the MS1 Extra code (MS1 - 68H908 based microprocessors). I assume this acts like a choke and needs to be closed like this. On initial start-up I was pleased to discover that my engine ran smooth at idle. It has the automatic 3-speed with overdrive. . 5 rockers, new double roller timing chain, and new lifters. The electronic throttle motor and pcm control the idle. low idle problem 350 TBI from Holley online for $1000,check the TPS,coolent temp sensor and the map sensor,will it run below a 1000 just rough maybe a ingnition An idle air control valve is, in a very real way, the predecessor to the drive-by-wire throttle systems commonly employed today. What i do know is that it is a 235 hp electric shift with a omc GM 350 v8. 7l intake had a bunch of buildup and didn't want to idle right until I clear out the Idle Air Control passages and some other stuff. 202. Description 350 chevy engine surging youtube. I have a 90 Sub with 333000 miles it runs pretty good, starting to lose a little power. 7L. Adjusting the TPS is not very hard if you know a few specifications. Incoming search terms: 1992 Chevy K1500,1993 Gmc Van Wont Stay Running Battery Is Dead,92 5 7 K Silverado Rough Idle When Warm,Can A Broken Vacuum Line Keep 350 Tbi From Starting,Chevy 350 Wont Stay Running,My 88 K1500 Has Great Power When Cold But Not When It Warms Up Related Documents & Media 2002 Ford E-350 Econoline Related Documents & Media 2002 Ford E-350 Econoline To view the related documents & media you must login to iATN (or join iATN ) as a premium member. Then it will drive perfectly normally. Data disappeared!) As some of you Dec 18, 2016 So, We ended up having to replace as follows: EGR Valve Throttle Position Sensor Coolant Temp Sensor Refurbished the TBI Idle air Control  1995 TBI 350 with 214k stumbles a little at idle, otherwise runs 67-72chevytrucks. Have to keep foot on gas to keep it running My car has 63000 miles. Here are some: Stalls at idle, stalls when I put the clutch in, stalls when I turn a corner, misfires, surges, no power, cuts out, no power at top revs, runs rough, etc. The car starts ok cold but then seems to "search" for the idle between 1500 and 250 (should be 500 RPM at operating temp). Richard CraniumMT 78,868 views. Now I have an irregular and rough idle - sometimes stumbling and pulsing with vacuum varying from 10-15". I have a similar issue on my 91 Suburban 350 TBI. One of the signs of a vehicle with a rough idle is a faulty Idle Air Control (IAC) Motor. Disconnect the battery and hold the cables together for 5 seconds to clear the fuel trim. 5 or 4. I plan to buy TBI rebuild kit but rockauto supply two kits, one for TBI100 & TBI200, the other for TBI220 & TBI295. Leaking vacuum hoses replaced 4. While the IAC valve's effect is fairly minimal while the TB valve is open, many engines rely on the IAC for idle or low-speed operation. To decrease rpm it moves the IAC valve in to reduce air past the throttle plate. Use timing light, clip on all wires to endure all firing, No … w start cold & ensure choke is closed-if so, you should have an adjustment for your fast idle to increase & or adjust butterfly & see if a little additional airflow will benefit. you can do the ultimate TBI mods to the stock 42mm TBI unit and get that air flow up to 500cfm without increasing that bore diameter which is plenty for any 305 engine that you can run with TBI. There is a split in the intake with the 2 barrel TBI. 350 tbi rough idle i changed the filter and my car regained all its lost power and purred like a kitten! Tap the throttle a few times. I have a stock 1989 Chevy Suburban 350 TBI with an annoying problem. Sbc Chevy 350 5. Despite 190,000 miles on the clock she has run perfectly until now, although quite heavy on gas. this jeep has overheated every single time i've driven it. Just got back to it since I have been off-on this for a friend. ) or a "controlled" leak a. I found electric choke wire connector bad . I have checked the vacuum lines, replaced the EGR, and have a new oxygen sensor. It would idle steady at around 1000 on woodgas. Search this Forum: You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum Q: Idles rough. Ran ok, had a tiny miss at idle. Milky oil, rough idle, low compression, loosing coolant (self. Nov 13, 2006 Starts and runs/idles rough until you accellerate some the it smooths out and runs like it should. I've got a There is no adjustment on a TBI fuel system, The Idle is controlled by the computer You need to check the Idle speed control solenoid. The last few mornings it's been around 25-30 degrees, I go out and start my truck to let it warm up and the exhaust just reeks of gas. Check all your vaccum lines too! rough idle, loss of power in gear and cruising 1 Answer. 7l 68-79 Stg 4 Master Engine Rebuild Kit Performance Rough Idle. Community discussions and forums for Chevrolet Pickup Truck : The stock 305 and 350 TBI unit has 2 (1 11/16″) bores which flow 450 cfm of air. Would appreciate your thoughts on this. The amount of steps needed is also learned, in order to improve the idle control. I started our 1988 Chevy pickup with a 350 V8 and throttle body injection. If it ran great from the day you bought it you would know what you know now Re: 1995 TBI 350 with 214k stumbles a little at idle, otherwise runs great I pulled the IAC to clean it and it was covered in carbon, so I tried cleaning it, got too aggressive and pulled the whole plunger out, breaking it. 350 tbi won't idle or drive I was able to get it to idle but it was mildly to moderately rough. Different owners seem to describe this problem using a variety of expressions. First thing I would do is hose down the TBI passages with some carb/intake cleaner. but it runs great when accelerating or about 60mph and faster almost like nothing is wrong with it. let of ga Re: high idle with tbi 350 08-23-06 11:30 AM - Post# 989933 In response to bowtie-badboy High idle is most likely going to be a vacuum leak, whether due to something actually leaking (base gasket, hose, etc. The truck has always been a little hard to start in cold weather but I started it today for the first time in several months. This is a good example of how basic engine diagnostic tests can work to pinpoint the root cause of the cars problem. My G20 van with TBI/EGR/TWC/H02S is idling rough as if a vacuum leak but checked all the lines and no leak. Checked TPS voltage at the ECU pins and at idle it is a round five volts and Visit enough car shows and you’ll begin to see certain styling trends under the hoods of your favorite vehicles. But hardly anyone references the butterfly on the TBI unit not being adjusted right. Secondly, nobody mentioned vaccum. First, it runs very rich (at least I think so). Not sure what the results will be using the stock throttle body on a 350 Vortec with a 4 barrel manifold with TBI adapter plate and appropriate fuel pressure. he said that the rough idle was do to the car strugglen for gas … and it would die because when u give it gas the gas is all stopping at the filter so the car dies. Will stall unless hold rpms up. For multipoint injected engines, the fuel pressure at idle better be much lower than pressure at wide-open throttle. Under the hood it sounds like its sucking alot of air from the carb but I'm not sure. Edelbrock is the most respected name in performance. This is a stock TBI 350 with an unknown service history. 7 5. We are a trusted name for over 30 years in the remanufacturing of OEM carburetors and fuel injection systems for both the automotive and marine industries. We had a custom chip burned for it (tbichips. Miss got worse this spring, and would happen while accelerating. 88 Formula 5. if clogged with carbon or '91 TBI 350 surging at idle and stumbling at speed Howdy - My father in law's '91 Chevy was running poorly, so we put new plugs, wires, cap and rotor on it, and it's running better, but it it still surging at idle. I have a home made billet 4bbl tbi I'm testing. Started up most recently which required a jump. Truck has ALWAYS ran great and smooth (been in the family since new). Greetings all. Skip to content. 7 l and ran into the very same problem and it was fixed by changing the idle air control sensor located on the left side of the throttle body. It won't idle on its own, you have to step on the gas to keep it going. Connected to the engine's primary air intake valve (the Throttle Body, or TB), the Idle Air Control (IAC) valve is responsible for making minor adjustments to engine airflow. It has 1. One of the most common problems is likely a rough running or poorly idling engine. 75" bores and an integrated spacer with 8 injectors spraying beneath the throttle blades. The truck has full power while driving. 80% of the time people jump to opti's. 2/2. If it ran great from the day you bought it you would know what you know now hey guys, i recently aquired a 91 chevy C2500 with a new rebuilt 350 tbi. 5 psi +/- 1 psi. While driving if you. I used an antidieseling solenoid off an old quadrajet carb. The exhaust smells "gassy" like it is running Feb 4, 2012 89 Throttle body 350 rough idle and hesitation sometime the tbi throttle shafts wear and cause vacuum leaks play in the tbi throttle shaft. Now the engine runs rough at idle and I can't seem to get it to hold 650to750 idle without holding the throttle control on the TBI. But the stable idle won't last long, it'll idle low and rough. The idle speed can not be manually adjusted. increase idle speed or decrease idle speed if the RPM doesn’t match the Target Idle RPM. 7l V8 Engine Rebuild Kit Performance Rough Idle. If I connect the vacuum advance to direct manifold vacuum it idles very smooth but idle timing increases to 36*. Fuel injectors spray: v8 wheel drive automatic, Thanks for all the help. Bad TPS? 1991 chevy 350 TBI Discussion in ' this would cause the engine to idle rough or stall at idle or when letting off the fuel. My Dakota 4. I had just replaced the MKI unit for the exact problem of not being able to get the engine to Idle at all. I had the timing light on it and n It won't idle on its own, you have to step on the gas to keep it going. It idles alot better and adjusts faster tha Text show contact info 1994 Chevy K 2500 light-duty 3/4 ton (6 lug rims) auto,4x4, 350 tbi, runs and drives, clean title, rear tires 80% front 30% 245/75r16,class 3 10000 lb weight distributing receiver, a/c and heat work,shifts smooth,truck is from Mississippi and is not rusted out, body is solid. Just low idle at 400rpm and has a slight stutter. I seem to have a rough idle, inconsist RPM's and seems to run rough went crusiing. It also does not seem to have a fast idle either. 2. The idle will come back up again and then go back down. i don't know what else to replace. I thought I was on my way but when I put it in gear it begins to Idles rough, runs lean at idle. Hello to the group, I am having a problem that is really kicking my a** and I am in need of some help/advice if anyone is willing. HUGE difference!!! Much better start up, better idle, better acceleration. Pay attention to low idle or stalling. Your idle will be rough, then smooth out. changed temp sensor, ERG, cleaned and rebuilt the TBI, replaced all vac lines, fuel filter, added sea foam. Re: 350 tbi rough idle no power Feb 20 2014, 3:43am My distributer did in my 88 K1500, replaced and it fixed most of the issues because for some reason it was causing voltage fluctuations. 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. Take 5-liter Mustangs. I’ve had a rough idle problem with the Chevy 350 engine in the van and haven’t been able to solve the problem for over a year now. At low speeds, when the EGR valve opens, the truck runs rough and will almost stall. Also, when you idle the ammount of air and fuel mix is small, less air = less fuel needed for lower engine speed. Nov 24, 2010 5. Replaced distributor and all has been well since. It has the engine and all of the associated wiring/ecm. rough idle, stalling, loss of power. When driving at cruising speed it E-350 6. These started becoming common on both gas and diesel engines sometime in the 1970s. Loading Unsubscribe from quadride100? chevy tbi base idle adjustment - Duration: 6:37. We have a 1989 1500 extra cab, 350, 1987 chevy truck 350 tbi stumbles sometime will die right off idle. The 4. When I rev it up and let it return to idle it almost wants to stall out and idles around 650rpm. You may have to register before you can post: click the register link above to proceed. 1995 Sbc Chevy Gm Truck Tbi 350 5. It idles extremely rough, and has been stalling. Ive tried everything tune up, sensors, timing, ect. I have a 91 Silverado K1500 4x4, 5. Re: 350 tpi runs rich,stalls, rough idle Really need to get a scanner so you can look at the operational data while the engine is running. I will have to replace it, but with wire connected it idles better but still missing. Idle is good and WOT seems normal (will spin the rear tires and sounds like it's hitting on all 8). if it continues to idle roughly after, then it may be loading up. 1984 1996 corvette egr diagnosis cc tech. 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 accelerat … 89 Throttle body 350 rough idle and hesitation I don't have a meter to check the tps but i did the sensor off of another tbi truck that was running perfectly just 350 tbi rough idle no power. Dec 18, 20161991 GMC 5. Sorry for the long post Check timing. even for an automatic. " See more I have a 93 chevy with a 350 it want idle and backfires threw the throttle body i have done the following trying to figure out the problem fuel pump and filter, distributor, cap, rotor, plugs and wires, cam and pushrods and lifters and tbi Chevy Gmc 5. 3 is the same as the 350 minus 2 jugs. This would cause a rough idle. The next day I added a bottle of Lucas fuel treatment to a fresh tank of gas. I'm back with more problems my 350 tbi will not idle without making a loping noise. Since 1938, Edelbrock has manufactured its core products in the USA for quality & performance. I’ve quite a bit of experience with old cars and trucks but the newer ones (yes, even 1987) give me trouble. com/vboard/showthread. Gmc sierra 1500 questions stalling out and wont stay running acts. Engine runs very rough at idle at around 750 rpm. Then when I let it sit for a day it drives great and only idles rough. Manifold vacuum, so those cans don’t work very well on a modified engine; with less than 15” Hg. I purchased a 68 Camaro 250 six last weekend, and drove it 300 miles to my home without a problem, except for a rough idle. IAC, EGR, EGR controller, MAP, temp sensor, vacuum leaks, O2 etc. if clogged with carbon or not adjusted right it will die. I guess I had a vac leak somewhere in the throttle body or in the gasket underneath the throttle body. k. the IAC. Same holds true with the off-idle BLMs. 7L TBI My truck has a rough idle when its warm, and misses when its cold. 3L High Idle Problems - Need Help! Can you help me figure out my 1998 4. nothing works. I pulled the plugs after 10 minutes of running and there is massive carbon build up on all of them and inside exhaust pipe. Once the car has been running for a while and the engine is up to operating temperature I run into the following issue: When I stop at a traffic light the car goes into idle ok. still has distributor and rotor and capacitor. by AKupNorth | April 10, 2018 12:56 PM PDT. When we were in town yesterday I purchased a new PCV valve for the van’s engine. 3 V6 it has a rough idle when its stopped in gear. One big advantage of the Dauntless 225 V6 is the heavy flywheels used on these engines. Just installed a rebuit TBI 350 essentially stock (has new cam but wasn't suppose to require adjusting ECM chip). Rough idle caused by the EGR valve The EGR Valve (Exhaust Gas Recirculation Valve) is an emission control device that allows exhaust gas to enter the intake manifold. A rough engine idle or stalling is a common complaint, but in some cases can be difficult to resolve. I have a 89 chevy surburban 350 tbi it has a real low chopy idle and stalls I put new plugs wires cap rotor in it I put seafoam fuel cleaner in it also its running 1. 1991 GMC 5. I've tried 6 and 14 degree throttle blades with similar results. First, the idle speed is controlled by an idle air control valve that is regulated by the engine management computer based on information provided from several sensors. 1. just got back to it since i have been off-on this for a friend. chevy forum at Car Dealer Forums; Truck runs great, but recently when the engine comes off the enriching circuit. 7) with TBI. Probably the most common problem that causes idle problems in multiport fuel injected engines is a carboned-up throttle body. The symptoms include stalling when coming to a stop, or very low idle after starting, or stalling if the throttle is "blipped" (opened and closed quickly). Warm Idle Speed = This is the Target Idle RPM for when the engine temperature reaches 170 degrees Fahrenheit. If i leave it for about 5 minutes or so, the idle will slowly start to drop and stumble like it wants to die but it doesnt. 350 TBI, 4L60E My 350 engine idles very rough, as if some cylinders were hitting harder than others or some are intermittently missing? Just above idle the engine smooths out and performs well. in my 1990 Suburban 350 4X4 during an engine rebuild. i have a tbi 350 out of a 90's truck in my cj. In practical terms, the position of the distributor which yields the highest idle speed is within a very few degrees of where it should be set. I would rev the engine as it started to sputter and then kept it running for 5-10 mins. it is not give any trouble codes mkll tbi rough running 08-28-2016, 01:31 PM I recently installed my Rotec TBI MKll on my 0360 LYC. When outside temp is below around 50 deg, the engine initially starts up fine, but runs extremely rough and will usually die if I don't bring the RPM's up a little. I am planning to put a new crate motor in it but have been fighting a rough idle problem for a while. There is no tach, but it seems like it's falling bellow 500 in drive and maybe sitting at 750ish in park. The next thing I'd look at is system fuel pressure. 1988 350 tbi idles funny stalls when put in gear and accels rough. My 350 TBI is running very rough. The problem is most people do not have a factory service manual handy and Haynes and Chilton manuals are not in depth enough with their small amount of information. com) and did the following mods. most, if not all the info below will apply for all engine options on this though. Master Engine Rebuild Kit Sbc Chevy 350 5 7l 87 95 Tbi Stage 2 Camshaft Pistons. I rebuilt the throttle body and flushed the injectors, replaced the fuel filter. Adjust mixture for highest obtainable vacumn, reset idle speed. Again, start the engine and compare how it is running at a stop to how it normally runs. New Posts Hot Thread (New) Hot Thread (No New) No New Posts Contains Posts by You Locked Thread. 7l 350 Torquerv Camshaft Cam+lifters Kit Tbi Stage 1. runs rough and feels starved for fuel when in drive and under any sort of load, barely drivable. memory serves, should be no more than 750. 350 mag efi 1996–1997 0f800500 0k001509 tbi mefi 1 & 2 4 350 mag mpi 1995‑1998 0f415189 0l339999 mpi mefi 1 & 2 4 forced idle rpm only mercruiser horn 1998 Chevy S10 4. Idle in Drive is only around 600 RPM (seem low). May take a few runs of doing it but eventually it should clear out a lot of crud. 7 TBI, the L05 I believe. Is the TPS bad? How about the IAC? It appears that too much fuel is dumping into the throttle body during idle and it seems like it is flooding. When I start it, (starts every time) it takes about 3 seconds from cold start to fire up. I have a 1991 K2500 with the 5. Stumbles and runs rough at lower throttle positions (just off idle). I also have a 94 with a 5. Today you can still net yourself a decent one for under $5,000, but chances are it needs some help. Rough Idle-'89 454 Tbi C/K Car Forums . I did some reading on the TBI so I took the carb apart and cleaned out the vacum lines (some where packed with carbon) After assembling everything the idle improve dramatically. Im experiencing the same problems. problem is that i cant seem to get the truck to idle or run correctly. '91 Chevy 350 TBI surging at idle and stumbling at speed Howdy - My father in law's '91 Chevy was running poorly, so we put new plugs, wires, cap and rotor on it, and it's running better, but it it still surging at idle. It is a 1986 c10 pickup with a 350 engine Holley 4 barrel carb . The truck was running perfectly in the garage for 35 minutes, revving and idling finepulled it out to do a road test and revved a few times and blam, backfiring, won't idle. Acceleration seems to be fine. 0L w/ electronic throttle (no cable) does not have a idle air control motor (valve). Idle Related Links Force Outboard Idle Honda Outboard Idle Johnson Outboard Idle Nissan Outboard Idle Tohatsu Outboard Idle Volvo Penta Idle Yamaha Outboard Idle I have a 91 Silverado K1500 4x4, 5. it has a new aluminum radiator, new thermostat, new serp belt, new belt tensioner, new rad cap, and new hoses. To check this remove the 88 Formula 5. This improved idle will last until i either shut the truck off or push the gas past 1/4 throttle. I was having some mild looping at start up and sometimes at idle at stop lights. Intermittent very hard start and rough idle when cold - '90 350 tbi If this is your first visit, be sure to check out the FAQ by clicking the link above. Again, runs smooth at idle and even Revs smoothly but only when the truck is in park. Hello, I'm new to the forum. looking into the throttle body at idle it seems just enough air is getting through but the edges of the butterfly seem to get a fine line of white with ice and lumpy idle gets lower. If the diaphragm moves, it's probably good. 02? . It's on a 350 with phase II Bowtie heads, a mild cam, and Performer intake. If vacuum decreases at higher engine RPM's, an excessive exhaust back pressure is probably present. when i went to pull out to leave it sputtered and tried to die under all but the lightest throttle pressure. 239):. 1988 Chevy pick up 350 tbi ran fine at first then started to idle fast then stalled when you put it in gear it got harder to get it to start then one day it wouldn't start any more what could it be? Re: 87 Chevy 350 TBI low Idle issue I had the same problem you described many years ago with my 87 350 FI 4x4 and after two mechanics played with everything with no results, I took it over and left it at the GM tech school and they found that the distributor shaft had become demagnitized. I have a 1990 Chevy S-10 Auto with a 4. Airboating Community & Resource. PRICED FROM $3995. you're almost at 1000 hot idle. I have a 93 chevy with a 350 it want idle and backfires threw the throttle body i have done the following trying to figure out the problem fuel pump and filter, distributor, cap, rotor, plugs and wires, cam and pushrods and lifters and tbi 1987 Chevy 350 idles & runs rough. php?t=6350821995 TBI 350 with 214k stumbles a little at idle, otherwise runs great rotor, coil, 02 sensor), but the rough idle wasn't cured by the tune-up