Replaced the fuel pressure. GMC, Chevrolet). Off-Road Forums & Discussion Groups > Chevy and GM > GM Standard IFS Trucks & SUV's > high idle with a 350 TBI When cold the engine runs at a higher RPM to heat. I have a 94' 350 tbi motor in an 86' k5. It now starts and runs much better. ZZ4 350 Base. 7 has been idling rough lately, although it's never stalled. The roughness clears up with more rpm and it runs strong above 1000 rpm or so,. 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. Exclusive Content Original Shows, Motorsports and Live Events. com FREE DELIVERY possible on eligible purchases. We've got a '95 K1500 pickup with a TBI 5. Greetings all. Our Chevrolet Silverado accessories cover the entire lifespan of Chevy Trucks, outfitting any year with quality, performance and style. A 350 will run on. this jeep has overheated every single time i've driven it. i have a tbi 350 out of a 90's truck in my cj. hello, I've got an 89 350 tbi chevy that has a misfire. It seems to be like a low idle issue. Hi i have a 94 chev k1500 350 tbi. 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. You can use a late 80's or early 90's GM TBI definition. Did the egr cleaning, egr solenoid replaced some old vac lines, fuel filter, new gas. chevy forum at Car Dealer Forums; Truck runs great, but recently when the engine comes off the enriching circuit. GMC, Chevrolet). 3 dropped in a stock Vortec 350 and moved everything off of the 4. 1991 Chevy K1500 5. My TBI 454 has been running rough. I know the choke is bad ( or at least pretty sure) because it doesnt do anything. 7 TBI Runs rough on cold start - Chevy Message Forum - Restoration and Repair Help. (Throttle Position Sensor) - 1994 Chevy C1500 350 TBI - Duration: 3:07. Since 1938, Edelbrock has manufactured its core products in the USA for quality & performance. When I get time, maybe I'll try cleaning the throttle body. Hi, I am having a problem with my chevy 350 engine that I just installed back in August. There is alot of things this can be my truck did the same thing,btu this was when i put a new cam in it. i have a 1990 s10 4. Feb 19, 2012 · Greetings all. After driving the truck for a minute or so, as the engine warms up, power drops off. Working on the rough idle problem When we were in town yesterday I purchased a new PCV valve for the van's engine. Problem came back for about 30 seconds then ran smooth. I purchased this GM crate 350 TBI engine as a direct replacement to the one in my 1992 Chevy 2500 series truck. Feb 12, 2011 · 1988 K1500 350 TBI. 7L MARINE APPLICATION BOAT Kit -For Stock Small Block Chevy 350 5 that a turn of the key and its running. As far as crate engines go, this one is a winner. Jan 24, 2013 · 1978 chevy 350 4 barrel q-jet carb. diaphragm, new fuel injectors, along with gaskets. When I starat my car cold, it will crank and crank and crankthen itll fire a few cylindarsmore crankingengine starts finally and runs rough. I have been all over the intake looking for leaks, because that was what I thought at first. Bore x Stroke (in. Runs fine for about 5 minutes then begins rough idle, and belching mostly black smoke with an occasional touch of blue. GM Throttle Body Injection 1987-93 LO3 (5. OK, I bought someone Else's problem. com : Car complaints, car problems and defect information. When I am on the road for 40 minutes plus at a higher rate of speed (55mph)the service engine soon lite comes on. I know, im just suggesting. It had been sitting for two years or so, and the second time I got it to operating temperature, it was running great, sounded good. My 2002 Chevy Suburban 2500 idles very rough when starting for the first time in the morning. I have a 91 Chevy 350 TBI in my truck. When I start it, (starts every time) it takes about 3 seconds from cold start to fire up. Hello, I own a 1990 chevy 1500 2wd truck it has a tbi 350 that me and my dad rebuilt. Now if i'm correct while truck is running if i move the throttle at the TBI the EGR valve should have some movement but it don't the tube does have some vacuum going to the EGR valve. Fires right up! Runs great no issues 350 engine: $300 you pull Body is rough but make good work truck. He built a 350 for it about 15 years ago. My 1991 Chevy Silverado starts up ok, but has a rough idle until it warms up. 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. The truck starts just fine, go out to it after school, fire's right off. 88 RC 318 TBI rough idle and then dies FIXED. Wondering if it might be vapor locking. Free Shipping! The Chevrolet Performance 350ci HO Base Engine doesn't sacrifice power or durability with its four-bolt main block, nodular iron crankshaft, Powdered Metal steel connecting rods and cast aluminum pistons. 05-19-10 01:12 PM - Post# 1917465 In response to mid tenn mike I will be VERY surprised if this ends up solving your problems. No mileage figures yet, but I expect a slight improvement. These vehicles featured a 350 ci, 5. We've got a '95 K1500 pickup with a TBI 5. Leveling Lift Kits for all models of GM / Chevrolet / GMC trucks including; 1500 silverado, z71, 2500 and 3500 HD, models. Hello, I own a 1990 chevy 1500 2wd truck it has a tbi 350 that me and my dad rebuilt. Heat causes expansion. It shipped/showed up when stated (1 week) and everything was as advertised. The cold start injector provides a spray of fuel, of 8 seconds duration max, to each cylinder via a air distribution system built into the intake manifold. Engine is from a 1974 Chevelle, rebuilt at time of install. Started up most recently which required a jump. Hard Starting. Hi guys, I bought a 2002 W3500 (cab over style) with a 5. 7 has been idling rough lately, although it's never stalled. A leaking intake manifold gasket can definitely cause the vehicle to run like this. I would like to know what is the normal idle speed when my truck is running cold? what is the normal idle speed when my truck is at normal temperature?. 7) with TBI. Guess what I'm saying is that the TBI car runs great and doesn't need any further tuning unless you want to alter the engine with a cam etc. The engine starts willingly and has power but idles rough. Looking for help please, 1998 5. It has an edelbrock performer package (cam/intake/carb) it has a mechanical fuel pump. 94 chevy k1500 350 tbi: in the morning when it is cold i start my truck and it runs rough with engine shaking and sometime dies. I have been all over the intake looking for leaks, because that was what I thought at first. This Chevy 1 Ton Van came in for an intermittent misfire complaint. Plugs look a little bit black but I haven't been noticed any smoke. It has descent power and just driving it seems fine but when you come to a stop light it runs real rough. The heated O2 sensor is needed on a header system, because the exhaust gases cool down too much at idle and will not activate the O2 sensor, the ecm then "sees" this and goes into "open loop" and causes the engine to run rich and idle rough, even though the engine may be fully warmed up. Once the motor is warming up (over 140-150 degrees) it will run good great. 7 TBI / Runs rough after installation of new fuel injectors and throttle body rebuild kit 3 Answers I have done a rebuild kit on my throttle body. Fires right up! Runs great no issues 350 engine: $300 you pull Body is rough but make good work truck. I did find the rubber link hose to the MAP sensor and canister purge line were cracked which caused some surging while driving. The sensor is new but the connection is suspect. The truck is a 35K documented miles but we all know it's tough to know for sure. GMC, Chevrolet). My L6 acted 180 that of my BB 396 which had a 12-1 and you couldn't get it fire off On Pump gas Not even by pushing it @ 45mph in 4th gear. Since 1938, Edelbrock has manufactured its core products in the USA for quality & performance. But drop a little 110 down the carb and it would fire up and Run But Once the motor was stone cold again NO Way it fire. 1990 Chevrolet K2500 350 5. Run the aluminum ducting from the neck through the hole and affix it to the bottom of the car facing forward. i have a 1990 s10 4. The truck has 190K miles on it and runs fine other than a misfire. I have taken it to a half a dozen mechanics, promising me that they could find the problem. L05 TBI 350 Fuel Injector Repair/Service. I've noticed that the car idles very rough when it's cold. Also, unlike cars, boat engines run cooler and at steady high rpms so the carbon buildup from low speed and idling should not be as severe. It sounds like the same problem thow,my truck would do he same thing. With options from small-block V8 to the high-performance LSX series, Chevy Performance gives you options for all your builds. It doesn't seem like it is affecting anything cause it drives fine and revs really fast. The truck puts out some black smoke whenI give it some gas, and smells. A great mild street engine! Will also fit 1955 to 1995 with electric fuel pump. 1992 S-10 Pickup V6 4. Any ideas?. I have a 1990 Chevy S-10 Auto with a 4. Question: I think it's something to do with the carb but what exactly is going on to cause it to run so rough until warm?. runs rough and feels starved for fuel when in drive and under any sort of load, barely drivable. If the truck runs rough when it's cold but clears up when the engine is warm, you have a stiction issue in your injectors. but after a couple of mins it straitens out and runs great however it is running rich and im only getting 8 mpg. Every internal combustion engine runs on a mixture of 14 to 1 which is fourteen parts air to one part fuel. well, it was in my 1991 chevy silverado that ran perfectly fine, so when i took it out i diddent do anything with the valves heads or cam, i just removed the TBI manifold & replaced it with a Quadrajet manifold, (currently adapted to a small holley 2bbl. 7L, TBI, 260K on the motor at idle, it's extremely high, around 1600-1800 RPM's when put it drive, drops down to about 1000-1200 (still way too high) I've put a new IAC (idle air control) valve in, checked my timing. So the problem seems to be that something is advancing the timing way out of range on cold start for 30 to 45 seconds, then it comes back to normal and runs fine. Chevy 350 Engine - GM Chevrolet 5. I also noticed when it's cold it runs slightly rough and the idle varys a bit. 7 Idle surging,stalling in the alt. The truck has a NV3500 so the whole truck would surge. 350 Chevy 440 Horsepower / 5 Year - 50,000 Mile Warranty… 454 Chevy Performance Engine / 475 Horsepower / 1 Year - 12,000 Mile Warranty… 454 Chevy Performance Engine / 3 Year - 36,000 Mile Warranty / we did research specifically for the application of this engine to motorhomes, call and talk directly with the owner on this one…. I have a 93' Chevy K5 Blazer that developed a cold start issue just recently since the temps have started hitting the 40's at night here in Eastern Washington state. As stated above, if you have access to a mechanic's stethoscope, you can set the end at the top of the rocker stud to listen to the noise a loose adjustment makes, which helps finding "zero" lash easier. 94 chevy k1500 350 tbi: in the morning when it is cold i start my truck and it runs rough with engine shaking and sometime dies. it idles around 1500 to 1800 rpm and it is. Step in and out of your truck, van, or SUV safely and easily. Crate Engines: Classic Chevy Race Engines | Chevrolet Performance engines. The misfire would come and go and has been getting worse. Then it started running so rich on a cold start that it will barely idle. Bruce Recently returned from long trip and our 87 Coachmen started running rough under load. Re: Chevy Caprice Classic - Rough Idle, Dies in Gear 07/29/2009 11:32 AM I want to thank each and everyone of you for taking the time to send me your input I'm going to start at the top and work my way down and I most certainly will let you know the outcome. If the truck sits for a few hours itwill start and run for 20-30 minutes and die again. Once it is warm, it runs good unless you try to accelerate real fast. 7 350 TBI 94' silverado. Engine is from a 1974 Chevelle, rebuilt at time of install. Lid from 350 GM pickup truck Any aircleaner lid from any carbureted or TBI chevy truck from 1968 to current allows for the use of a taller aircleaner element. Plugs look a little bit black but I haven't been noticed any smoke. The carburetor delivers the air/fuel mixture to the engine, and the distributor ignites that mixture within the cylinders. is, the worse the truck runs. 3 V6 is that the systems all work basically the same and GM has kept the wiring the same so there no real need to have the exact wiring diagram for the system you are installing. My TBI 454 has been running rough. This started as a surging while driving at constant rpms. This is my dad's tru8ck and he was driving and it suddenly started to run rough. I have a 91 Chevy 350 TBI in my truck. When I step on the gas a bit it will run but idle really rough. Thousands of classic cars, hot rods, exotics and collectibles in stock. S-10 Cranks Wont Start. Heat causes expansion. It has an edelbrock performer package (cam/intake/carb) it has a mechanical fuel pump. The heated O2 sensor is needed on a header system, because the exhaust gases cool down too much at idle and will not activate the O2 sensor, the ecm then "sees" this and goes into "open loop" and causes the engine to run rich and idle rough, even though the engine may be fully warmed up. 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. GM Computer codes = no Got new battery installed. 7L 350 V8 in the alt. Jul 01, 2010 · Check out this 305 small block engine build with Trick Flow Specialties heads, a Comp Cams Xtreme Marine camshaft and ProComp aluminum rocker rollers - Super Chevy Magazine. 3 L GM tech = MW question = I have a 1999 Chevy Silverado that i bought about 2 months ago. GM TBI Swap. Discuss 1990 TBI 5. but after a couple of mins it straitens out and runs great however it is running rich and im only getting 8 mpg. Recently, after starting it, it’s been × We use cookies to help our site to work, to help us understand how it is used, and to tailor advertising on this and other sites. Sep 21, 2016 · So I have an 87 Silverado half ton. The truck runs fine when it is warm, but when it is cold it runs rough, rich and stalls. CarComplaints. When you first start in the morning, it will run at the elevated RPM, but when it starts to drop back down to the normal idle, it will start to run rough and the RPM can drop to about 300 RPM and then jump back up to 1000 RPM. Had recently filled up and thought it might be bad gas. New and Remanufactured Throttle Body Assemblies for 305, 350, 454 Chevy, GM, GMC Trucks, Cars, Vans and 6 Liter and 7 Liter Trucks. New cap, wires, plugs and. My 1991 Chevy Silverado starts up ok, but has a rough idle until it warms up. cleaned everything up with throttle body cleaner. Mileage down from 13avg to around 8. [SOLVED] extream high idle problem on 1990 chevy 1500, 4. The SES light was on when I bought the truck but this rough running and rich mixture thing began about three minutes after I started the truck today. The General Motors Rochester Throttle Body (TBI) is OEM original equipment. Running very, down on power. Discuss Correct Idle Speed for 5. These vehicles featured a 350 ci, 5. My truck has a intermittent rough Idle. Anyone can take it for what its worth. I have a chevy 355 crate motor in my 78 Jeep cj7. See our Performance Chevy Crate Engines. I found one on the pb port and repaired it. The truck runs fine when it is warm, but when it is cold it runs rough, rich and stalls. The engine was running rough (misfiring) between idle and 1600rpm when cold. 94 chevy k1500 350 tbi: in the morning when it is cold i start my truck and it runs rough with engine shaking and sometime dies. How to hop-up a Chevy 350 engine with a cam and fuel system. Apr 29, 2002 · The EGR valve took care of a "check engine" light problem, but nothing seems to clear up a rough idle when the engine is cold or heavy ping when the engine is hot and pulling hard on a grade. runs rough and feels starved for fuel when in drive and under any sort of load, barely drivable. Hi guys, I bought a 2002 W3500 (cab over style) with a 5. Started up most recently which required a jump. I have a 91 Chevy 350 TBI in my truck. I had the timing light on it and n. Chevy Tbi running rich problem solving 90 k1500 5 7L won't stay running. You did the right checks as far as you could go. I have used propane, carb cleaner, and wd40 to try to locate leaks. Engine skipped occasionally and would pop-pop-pop under heavy acceleration. 454 Runs Rough. City-Data Forum > General Forums > Automotive > Brand-specific forums > Chevrolet, Cadillac, Buick, and GMC: Do I use 10w40 or 5w40 in my 1990 5. 7L (350) engine and it is due for an oil change again. Our Chevrolet Silverado accessories cover the entire lifespan of Chevy Trucks, outfitting any year with quality, performance and style. Mar 08, 2015 · It will still usually run fairly rough for a minute or 2. Started it Monday afternoon and the rough idle was back. Chevy V8 Misfire Caused by Excessive Cam Retard. It gets a signal when cranking from the ignition switch to fire the injectors. Cold needs more fuel than warm. I have been all over the intake looking for leaks, because that was what I thought at first. Read on as Jeff Smith help a reader resolve an issue with his 1989 Chevy K2500 engine concerning the installation of TBI heads. Lid from 350 GM pickup truck Any aircleaner lid from any carbureted or TBI chevy truck from 1968 to current allows for the use of a taller aircleaner element. It idles fine and runs great but after a ride if I shut it down and try to start it up after 5-10 min it wont start unless I floor the gas pedal (like if you drive to the store and then come out a few minutes later and try to start). When I am on the road for 40 minutes plus at a higher rate of speed (55mph)the service engine soon lite comes on. It sounds like the same problem thow,my truck would do he same thing. City-Data Forum > General Forums > Automotive > Brand-specific forums > Chevrolet, Cadillac, Buick, and GMC: Do I use 10w40 or 5w40 in my 1990 5. Suspension Lift Kits, Leveling Kits, body lift, Ford, Chevy, Jeep, Dodge, Toyota, Mickey Thompson Tires. Moe C 190,980. 7 TBI Cold start flooding issue Hey gang new here and in need of some help. 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. Wiki User Asked in Chevy 350 Rough running Chevy 350 at the start then runs good? sounds like your choke isn't working or isn't set correctly. At the exhaust, the best way I can describe the sound is like "chuff chuff chuff chuff" However, I've pulled the plug wires one by one and it only gets worse, like a true dead cylinder. I found one on the pb port and repaired it. 7L, TBI, 260K on the motor at idle, it's extremely high, around 1600-1800 RPM's when put it drive, drops down to about 1000-1200 (still way too high) I've put a new IAC (idle air control) valve in, checked my timing. He built a 350 for it about 15 years ago. 7L/350 Standard Motor Idle Air Control (IAC) Valves and get Free Shipping on Orders Over $99 at Summit Racing! Standard Motor Products replacement idle air control valves help you get maximum fuel efficiency and powe. was throwing code 33 so i replaced the map sensor with a new one. After that, no spark but good fuel at the injectors. 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. Runs really rough as in jumping up and down when it's really cold outside but runs fine after it warms up. Wondering if it might be vapor locking. My recently-purchased Kaiser M715 was rebuilt by Memphis Equipment in 2007. Question: I think it's something to do with the carb but what exactly is going on to cause it to run so rough until warm?. This means if a 454 throttle body is chosen, it will be for radical (for off-road) application not desirable for the. It will burn your eyes after it has ran in the garage for a few minutes. CarComplaints. i have a chevy 350 small block that knocks at idling rpms. I shut it off, reconnected the EST wire and restarted. Ran rough and stalled. The way it's running I don't doubt it will foul them all again this time. 1988 Chevrolet Suburban for sale Bremen, GA - $5,500 1988 Chevrolet Suburban 1988 Chevy Suburban Crate 350 Cold A/C Runs Great Your classic car classifieds & community. problem is that i cant seem to get the truck to idle or run correctly. it has a new aluminum radiator, new thermostat, new serp belt, new belt tensioner, new rad cap, and new hoses. On cold start up it idles rough, until warm, even spits and sputtes driving down the road, once it is warmed up she runs great. S-10 Cranks Wont Start. hey john i stay in indianapolis and have the above rough idle at any rpm below 900 and hard cold start issues with carbureted 1968 307. Below is a list of things I have done so far and I am running out of things to. I went to AutoZone and picked up an IAC and changed that Monday night. Page 1 of 3 1 2 3 Next >. '87 Chevrolet TBI 350 runs rough under load. I had my 2001 Striper with Volvo Penta 5. Nov 06, 2003 · ur egr valve if faulty and closed,wont hurt ur car, it just wont pass ur smog test and will be bad for the inviorment not to mention a very cold start in the mourning, meaning ur egr valve is prob faulty and u dont even know it, but if its stuck open due to carbon build up, ur idle will be rough,but still be good at acceleration, its easy to. City-Data Forum > General Forums > Automotive > Brand-specific forums > Chevrolet, Cadillac, Buick, and GMC: Do I use 10w40 or 5w40 in my 1990 5. Started it Monday afternoon and the rough idle was back. 4L TBI engines run too hot. Jan 24, 2013 · 1978 chevy 350 4 barrel q-jet carb. It was bored 40 over with the heads redone, a performer rpm intake, hei dist, headers, and now a holley 600. 5% being the usual failure point. Again, runs smooth at idle and even Revs smoothly but only when the truck is in park. 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 We use cookies to give you the best possible experience on our website. The beauty of the TBI systems used on the small block Chevy and the 4. Ive tried everything tune up, sensors, timing, ect. 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. Hard Starting. It sounds like the same problem thow,my truck would do he same thing. But drop a little 110 down the carb and it would fire up and Run But Once the motor was stone cold again NO Way it fire. So I have a 95 TBI 350 with about 190K miles on it. No check engine light on but i will check any way i'm at a loss on what's going on. 3L TBI Rough Idle Problem Hello, I have a 1988 Chevy S10 Blazer with the VIN Z 4. Mar 18, 2013 · A car exhaust smell can be due to many different things. Genuine Chevrolet, Buick, GMC and Cadillac Accessories are the only accessories backed by GM. Chevy 350s typically have problems starting in cold weather, especially with temperatures approaching freezing. If you're looking for a reasonably priced vehicle, odds are that Chevy will have something. this jeep has overheated every single time i've driven it. I have a 1987 350 TBI and it seems it takes more turns to start than it should. 3L V6 engine, and it very suddenly developed this loping, stuttering idle problem. The Iron Duke engine (also called 151, 2500, Pontiac 2. Oct 12, 2006 · Discuss 1990 TBI 5. I have a 1990 K1500 5. 7 L) small-block that became the GM corporate standard. 7) with TBI. Relationship between temperature and running OK, rough idle at start and missing which clears itself, all point to fuel air mix too rich. chevy forum at Car Dealer Forums; I have an '86 GMC 1/2 ton pick-up that now has a 5. I got it timed and the idle is still rough i have to put it in neutral and press the gass so it wont die at a stop light or stop someone plz help im geting to the point. Very noticeable in second gear at about 25 mph. This engine was designed as a direct replacement for 1987-1995 Chevy & GMC pickups, SUV's, and van applications. 05-19-10 01:12 PM - Post# 1917465 In response to mid tenn mike I will be VERY surprised if this ends up solving your problems. I have taken it to a half a dozen mechanics, promising me that they could find the problem. Very noticeable in second gear at about 25 mph. Although all of Chevrolet's siblings of the period (Buick, Cadillac, Oldsmobile, Pontiac, and Holden) designed their own V8s, it was the Chevrolet 305 and 350 cu in (5. It's electric choke on a holley 4 bbl. Nov 27, 2012 · The normal idle is about 600 RPM. 3 4WD Vortec V6. well, it was in my 1991 chevy silverado that ran perfectly fine, so when i took it out i diddent do anything with the valves heads or cam, i just removed the TBI manifold & replaced it with a Quadrajet manifold, (currently adapted to a small holley 2bbl. Page 1 of 3 1 2 3 Next >. Silverado & Fullsize Pick-ups - 94' runs horrible when warm - If this exact problem was already covered, i couldnt find it. show contact info. EFI Complete TBI Fuel Injection Kit Stock Chevy 350 5. Started up most recently which required a jump. 1994 Chevrolet C1500 Cheyenne 5. Wiki User Asked in Chevy 350 Rough running Chevy 350 at the start then runs good? sounds like your choke isn't working or isn't set correctly. The normal idle is about 600 RPM. Engine Type: Chevy Small-Block V-8. 4L TBI engines run too hot. Any ideas?. Re: 1995 TBI 350 with 214k stumbles a little at idle, otherwise runs great Took a 250 mile 5 hour drive today to get a Craigslist score of great condition wheels with 40% tires for $50. run the truck with a fuel pressure gauge on it. Once it is warm, it runs good unless you try to accelerate real fast. I have used propane, carb cleaner, and wd40 to try to locate leaks. Remember this is at idle so it is not an issue with overheating the heads and burning valves. This is on an 78 350, HEI. I have a 350 SBC with cast-iron heads, hydraulic lifters, and just the stock stamped rocker arms. after sitting overnight or for a couple hours when its cooled down. Fuel injection is becoming a very popular upgrade or TBI conversion to any carburated vehicle, get that new car starting with Fuel Injection from Performance Fuel Injection Systems. When installed by an authorized GM dealer, genuine Chevrolet, Buick, GMC and Cadillac Accessories are covered for the balance of the new vehicle’s warranty or 12 months / 12,000 miles, whichever is longer. I did find the rubber link hose to the MAP sensor and canister purge line were cracked which caused some surging while driving. 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. 7L TBI - Rough Idle/Stalling Drove it to town last Friday. If she fires you got a fuel system issue to sort out. This is a general guide which will list symptoms for 944 starting and running problems and common causes of those problems. I also noticed when it's cold it runs slightly rough and the idle varys a bit. When shifting into drive, engine runs at idle rpm, when throttle is pushed down to come off idle, engine coughs & dies. (1988 K1500 TBI 350) I discovered the hard way that an O2 sensor can test perfectly good at low speed, but provide false "lean" indications at highway speed. Square Body Farm: 73-87 Chevy & GMC Truck Sales August 24 · Sorry for the delayed post, but here is the Square that traveled the farthest last weekend to attend the Square Body Gathering in Richmond, Indiana. See our Intake manifolds - 350 320 318 Chevy. 1978 chevy 350 4 barrel q-jet carb. do NOT contact me with unsolicited services or offers. I have used propane, carb cleaner, and wd40 to try to locate leaks. A 350 will run on. chevy forum at Car Dealer Forums; I have an '86 GMC 1/2 ton pick-up that now has a 5. com : Car complaints, car problems and defect information. A few times it has done this at idle when I’ve been able to get out of my truck and walk around. Recently, after starting it, it's been × We use cookies to help our site to work, to help us understand how it is used, and to tailor advertising on this and other sites. Lid from 350 GM pickup truck Any aircleaner lid from any carbureted or TBI chevy truck from 1968 to current allows for the use of a taller aircleaner element.