7 GSi with TBI worked on by a shop here in San Diego (I wont mention any. You didn't state if this engine was high mileage or not, but usually the first thing you do on an old engine that has misfires is to check the status of the cylinders by doing a compression test using a compression test gauge or doing a relative compression test using a lab scope and current clamp. but is it really worth keeping and building up? or should i leave it alone? or get a new engine?. After driving the truck for a minute or so, as the engine warms up, power drops off. 3/20/2018 Still going Strong, my Holly TBI is all tuned in, engine idles almost as smooth as a newer gernration engine, got just a very slight feel but its about the same as the wifes new car at idle so I'm very happy, From a dead stop its smooth and quite still, and I'm running very quiet muffler so its got that new car sound. Chevrolet Truck Hesitation Problem Fix. i have a tbi 350 out of a 90's truck in my cj. net - Car Forums, Automotive News and Community. 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. 7 rough idle quadride100. To obtain these types HP, engines were tested with a TBI 52 mm SBC TBI throttle body. The engine has started to idle very high. After another 20 seconds its rough again, then smoothes back out. almost dies. then remove the battery cable for 10 seconds to clear the memory for the computer and then let it run for a while to re learn how to idle. 89' 1500 350 TBI rough running, any help appreciated a few weeks ago the truck started running rough when taking off as of late is that it does it far worse. Again, I have a 1990 K5 Chevy Blazer with the 350 TBI. I would say that is varies a few 100 rpm. un plug the o2 sensor, first one out from the engine and see if it runs good. It will not care about any sensor inputs when in open loop thus if running good you know its relative to sensor input. All of you men can likewise use this Hemp Body Butter on your dry rough skin spots on system to help repair them as well. Never have seen the Yamaha or the Honda oil temp light come on continuously when operating the engine on hot days though. I've seen few IAC troubles with TBI but the six liter engines in our vans do have problems. Now it idles rough and seems like its running rich, i get black smoke out the muffler. So no shift points. Failed Temp sensor set code. it has adaptive strategy to learn how to run right. I'm running out of ideas. Before it dies it never shows and sign of running rough. 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. After that, no spark but good fuel at the injectors. Marine engines run under a heavy load constantly (much like trucks) but do not have transmissions. I am still on the fuel/air mix. 0 at startup runs ruff for about 1-2 minutes then smooths out,the FICM at 48. 7L Running rough when warm. Tore down to nothing. Replaced sensor with. The engine stalls when putting into gear and runs rough at low speeds. Warm the bike up and turn the mixture screw to where you get the highest RPM. Hello, I'm new to the forum. Runs rich when warm - My Caprice has a 350 w/TBI. These other sellers have cap. Our intention was to run the original 2G carb that came with the. I didn't set the Gap on one of the plugs right and it caused a miss at high speed when the engine was hot. It is not constant rough idle, but more like once warm it develops a miss/hiccup every 5-10 seconds. r/MechanicAdvice: This is more than a car repair forum! most of the older 305 had bad camshaft wear. See our Chevy Camshaft. The exhaust smells "gassy. The best way to set a pilot circuit is with an RPM guage. After messing with the connection, the truck’s power has mostly been restored. AND, it’s still idling quite high, maybe 1200rpms; a bit higher when hot. almost dies. The glue on the elbow near the TBI turned to liquid when the engine got warm and the hose would not hold a vacuum. Dodge Truck & SUV forum with the best tech and vehicle help on the web. Although it runs when cold started, the engine "hunts" in RPM and engaging the tranny (700r4) will occaisionally cause it to die. They typically accelerate up to three quarter throttle (or full throttle if your one of those) and then run for long periods at. I dont know y it's idling so rough it only does this when it starts to get warm so i dont know what it is. I bought it new. Consult a service manual or see below for any check engine light code definitions. Once on plane and up to speed, its hard to tell that it is running rough, but it is. Surprise, way smoother idle,cruise, and rediculous throttle response. If the timing is RETARDED, the engine will run hotter; try advancing the timing. Rough idle but otherwise runs fantastic (1993 Chevrolet C1500) Truck runs great when driving down the road and idles smooth for a couple minutes after coming to a stop. new 350 rebuild running hot!! I rebuilt a sbc 350 in my new to me pick up last fall. 7 TBI runs rough when cold Discussion in ' A free breathing exhaust will make a cold tbi run funny till it warms up because of the non heated o2 sensor. It runs fine but when under slightest load (like disengaging clutch 1/2/3rd gear) it bucks/surges horribly. My '83 was running lousy for the first 5 minutes or so after start up (warm or cold). They raise crops from Philpot, Ky to just west of Rough River and wear more tires out due to road driving getting from one farm to the other than actually tillage. Truck runs good about one week a month the other three it smokes and runs like a four cylinder. This is a complete ready-to-run hot system when you choose our Fast Track Startup option with this Turnkey Package. A couple of times it has even stalled out. This xdf covers all of the original applications of the code. Possible intake manifold gasket problem. These sharp corners can get red hot while the engine is running because of poor heat dissipation. At 3/4 to WOT the computer uses a fixed program for max power. Good for around 10hp. 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. Timing at 0 degrees BTDC in bypass,. need ideas This truck originally had a 400 in it which as I understand it they were hot running motors due to the thinner bores. 0L Excursion, 2003-2007 6. but after a couple of mins it straitens out and runs great however it is running rich and im only getting 8 mpg. My TBI 454 has been running rough. Bruce Recently returned from long trip and our 87 Coachmen started running rough under load. Freeway trip home was problem free, except I got a code 45 (running rich). The TPS is one of the main sensor inputs on a TBI (speed/density) type system. A customer with a Mazda 626 and a four-cylinder engine had a very rough engine idle. 7L Chevrolet truck. If the truck sits for a few hours itwill start and run for 20-30 minutes and die again. Now this new problem seems to be similar but 100 times worse at low rpm's , the thing barely runs, and backfires through TBI sometimes. A few months ago my Yukon started running very rich. As you can tell, it doesn't deliver. 48 I have a 1990 chevy conversion van,350 tbi,no problem in 5 yrs I've had it. Intermittent Rough/Hunting Idle when warm. this engine runs rough when cold misfires and so on, then when hot while running at higher speeds it backfires through the tbi unit. has a new top end and some bolt ons. it has adaptive strategy to learn how to run right. Good for around 10hp. Happened twice, about every 40k or so. 7 tbi run like a bag of sh*t only after it got warm from a lazy o2 sensor. 0x1 v250 Advanced $0D. It will consistanly shut off when warm and shifting into gear. The Iron Duke engine (also called 151, 2500, Pontiac 2. 350 TBI low idle. I have a 1991 K2500 with the 5. * Last spring (2011), I started having slight hard start rough idle after running to fishing spot and turning off engine for 10-45 minutes. I bought it new. I removed the elbow and used some new vacuum hose between the hard plastic line and TBI. Feb 19 2012, 5:20am. The colder the outside temp. The engine runs fine when cold but as it warms up it starts to "surge" at idle and when you come to a stop it acts like it wants to stall then it grabs. Complete TBI Conversion Kit for Stock Big Block Chevy 454 7. These other sellers have cap. I Googled a few articles on rough idling Jeeps around the Web. 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. L05 TBI 350 Fuel Injector Repair/Service Hello, so I recently decided that my rough and fluctuating idle may be the fuel injectors. AND, it’s still idling quite high, maybe 1200rpms; a bit higher when hot. Running cool (160 F) What I've done so far: 1. 1993 GMC/Chevy 5. Under a load on a hill it feels like I am loosing one or two cylinders. Exterior; Chrome front and rear bumpers; Conventional lens halogen bulb headlights; Courtesy lights; Metallic paint , black paint , gloss paint; Rear platform step; Heating, Venti. It cost less than the valve. I have it running better, and I think it was the injectors. The head flow right at 300. No revs with that so I moved on to timing. My Engine Runs Rough When It Gets Hot But Ok When Cold. This page is dedicated to the owners of these vehicles equipped with GM's dual point fuel injection (model 220 TBI). dual snorkle air cleaner was available on L69 305 carbureted f-body engines up until ’87. Therefore,since it is not reading the A/F ratio you may need more or less fuel for maximum power. i can jumper the starter solenoid and it starts right up. then remove the battery cable for 10 seconds to clear the memory for the computer and then let it run for a while to re learn how to idle. 3 is the same as the 350 minus 2 jugs. When you unplug it, the ECM goes into "limp home" mode with a pre-set series of tables designed to have the best shot at keeping the engine running until you can get somewhere safe to fix it (a garage). 7L TBI - Rough Idle/Stalling start the engine and the ENGINE RUNS ROUGH, misfiring, etc. The engine misfires or runs rough when it is fully warmed up at constant speed or stopped and really bad when pulling a load up a hill or when power breaking. Its a 94 block, with the 89 accessories/head/etc. It runs really really rough on start up, when the weather is warner it runs better, not good, just better. Greetings all. Yesterday I put Seafaom in tank and ran for 20 minutes. 86 Fourtrax 350 running rough when hot. Rough idling is a common problem, of which the exact cause can be difficult to diagnose, as several factors may come into play. 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. It soon recovers generally without stalling. The engine stalls when putting into gear and runs rough at low speeds. I am stumped on this one, i usually am pretty good at working on vehicles, but i am at a loss of ideas. it will run while. Also the injectors are different between the 3 engines too, some will say or tell you a 305 (5. 7L TBI My truck has a rough idle when its warm, and misses when its cold. im not sure if its worth building up or just get a new engine for the truck. it just started doing this, i. New Quality Hand-Built in America Chevy 350 Small Block Engines for Sale for Your Street Performance Hot Rod, Muscle Car, or Classic Truck! Available in Short Block, Long Block, and Custom Crate Engine Packages. but is it really worth keeping and building up? or should i leave it alone? or get a new engine?. 0 mercruiser high rpm wide open and over heat; 350 magnum fuel cooler engine running hot at 4500 rpm; 350 magnum mercruiser overheats only at low rpms; 350 mercruiser boat overheating at high rpms; 350 mercruiser rough. Mileage down from 13avg to around 8. It cost less than the valve. 7L TBI Mercruiser with Bravo 3 drive on a Sig 260. Page 1 of 3 1 2 3 Next >. If, when warm, the idle seems to hang when blipping the throttle, the pilot circuit is too lean. 1991 chevrolet suburban v2500 4x4 rough idle stall ****UPDATED, FIXED****. As soon as I put it in drive it drops further to the 400 or 350/300 mark. On a tune up with the cap and rotor being replaceda good rule of thumb is to replace the plug wires the same timeone less headache later on. I had my 2001 Striper with Volvo Penta 5. 350 TBI with turbo 350 trans. But as the engine starts fine cold and warm when re-started withing 3 minutes. 1990 Chev K1500 Surge Stalling After Hot Soak Chevy/GMC TBI flooding smoking running rich diagnose and fix. Re: 1988 350 TBI idles funny, stalls when put in gear, and accels rough Fixed! After rebuilding the fuel pressure regulator, new fuel filter, plugs and wires, I finally dropped a new fuel pump in and seems to be running like a champ. The check engine light is not on. Rough Idle Diagnosis. Talked to the guys at the local shop they thought it was the idle air control, replaced that and it made very little change. then remove the tool to run it in. It runs really really rough on start up, when the weather is warner it runs better, not good, just better. How do we adjust an engine’s idle speed? In the past, adjusting an engine’s idle speed was easy. Mileage down from 13avg to around 8. 0 truck runs ruff on start up from sitting overnight,50 or colder it does this running 5-40 oil FICM voltage at 46. this morning same deal, couple minutes of running great allowing me to move the car and back it up on the ramps then a flip is switched and it runs rough and stumbles. If I try to crank it up right away it would catch but would immidiately die. Im kinda new at this. 3/4 ton, 350 TBI engine with 125,000 miles. i can jumper the starter solenoid and it starts right up. A condition of running rough can be one of many factors. They didn't seem concerned with the engine idling problem. I have TBI as well and lemme tell ya, its WEIRD. 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. Had recently filled up and thought it might be bad gas. This Tbi Adjustable Regulator is needed for stock and modified GM tbi engines. The truck runs pretty good in drive when it is warmed up. However it idles rough on ocasion. Most of the carburetors installed on the 350 use a single air/fuel mixture screw, while some carburetors use two. 93V8S10 0. Mathieu Levesque 56,941 views. it has 186k on it. The truck starts and runs great untill it warms up. Two fuel injectors mounted on top of the throttle body inject fuel into the motor. 91 350 TBI rough idle and no power at all with a new rebuilt 350 tbi. Also the injectors are different between the 3 engines too, some will say or tell you a 305 (5. My 93 chevy truck with a 350 motor(TBI),will start right up and runs good now that i've changed the timming chain and gear and alot of other stuffm,but when warm the idle goes from 1000 rpms to100 rpms and just keeps jumping back and forth,please help. More rough the ever. 0 volts after it runs for a few minutesno codes and is underpowered for the first five or ten miles then has plenty of power this is after warm up in the drive way. 0L with a Ford B303 cam, GT40 heads w/ 1. net - Car Forums, Automotive News and Community. Idle is good and WOT seems normal (will spin the rear tires and sounds like it's hitting on all 8). About the Chevy 350 Crate Engine Every since it's debut in 1967 the Chevy 350 has been the workhorse of the General Motors engines. for a GM TBI application to read the data, or to check for stored codes. im not sure if its worth building up or just get a new engine for the truck. Good for around 10hp. Now for my question. 1987 Chevrolet Truck rough running 350 tbi. I installed the PCV valve and started the engine and warmed it up and the problem was still there, so I started checking things over making sure all the rubber hoses fit tightly. 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. Rough idling is a common problem, of which the exact cause can be difficult to diagnose, as several factors may come into play. Here is problem: The engine has alot of power, shifts smooth ect. if its the camshaft you will notice little movement on the rocker arm. 1990 Chevrolet K2500 350 5. how much fuel pressure does the pump need to put out? have to work the pedal to keep it running! seems like it running out of gas to me… i give up! just runs good for a second then dies then starts right up run for a. 0's, rough idle and stalls out when warm I have been following a number of threads on 6. I wish I did that first. I have a 95' Chevy with a fuel injected 350 TBI. A typical TBI pump pressure must be able to maintain 15 to 18 PSI. When I start it. 94 Chevy Truck surges at idle in gear, loss of power under accel? I just bought a 1994 K2500 w/ 5. How your engine idles is a good indicator of its overall health; addressing the problem sooner rather than later and checking all potential causes is important. Over fueling leads to oil level rises and eventually a blown cylinder or two, anywhere from 12,000 to 20,000 dollar repair. Figured needed new plugs and wires. I have TBI as well and lemme tell ya, its WEIRD. i started it to move the other day and it ran perfect with all throttle input for about 2 minutes. I own a 1989 Wrangler YJ 2. Rough Country's Nerf Steps provide unrelenting style and easier access to your vehicle. It does not take long either. Chevrolet Truck Hesitation Problem Fix. In my case, about 20 seconds after a carb jet plugged at 3000 rpm and I noticed a power drop off until the motor seized with a broken piston. while its running, the. Relationship between temperature and running OK, rough idle at start and missing which clears itself, all point to fuel air mix too rich. For 99-16 FORD F250. Now it idles rough and seems like its running rich, i get black smoke out the muffler. unplug distributor power wire and have someone turn it over for ya. 350 TBI won't start when timing bypass is disconnected / unplugged was created by Napy134 Hey guys, I'm new to this forum and new to owning my first chevy truck (with a small problem - hopefully!) and I wanted to post this here for some help/advice/guidance. 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. The truck starts and runs great untill it warms up. On the road down Millers towards Hungry Valley, I noticed it "stumbled" on right hand turns. I got it going again and by pumping the accelerator, I managed to limp home -- had to run a couple of stop signs, though, because it just flat would not idle at all. 0 liter mercruiser running rough at high rpm; 3. Then when I let it sit for a day it drives great and only idles rough. I swapped in to other used ones, and it ran better, but not great. You may have noticed other sellers using a similar name offering similar products. I have a 97 7. One of the most common problems is likely a rough running or poorly idling engine. 0) is the same as a 350 (5. Marine engines run under a heavy load constantly (much like trucks) but do not have transmissions. AND, it’s still idling quite high, maybe 1200rpms; a bit higher when hot. in the summer when i cut my heater off mine would run hot. These steps offer a clean install that lends to the look of your lifted vehicle. In the "Old" days, that was a stuck choke. Despite 190,000 miles on the clock she has run perfectly until now, although quite heavy on gas. 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. It will start, run about 2 seconds, then dies. With respect to our problem of rough running, an EGR valve can be a cause if it becomes fouled with carbon. Re: 1988 305 TBI Runs rough for 5 seconds When you just changed the sensor did the gauge say the car was running cooler. Now for my question. 5 turns, change the pilot jet and try again. 3 powerstroke, when i first start it when its cold it runs real rough and the check engine light comes on, then after about 20 seconds it smoothes out and the light goes off. Took the bike out today, still running rough and sputtering. The check engine light is not on. I own a 1989 Wrangler YJ 2. Initial Calibration of the TBI Disclaimer The author of this presentation assumes NO responsibility for information provided causing the owner to modify or alter their motorhome which shall result in problems or mishaps. The best course of action is to take your vehicle to an Omaha auto service professional, but here are a few things it could be…. The engine would idle perfectly, but as soon as you put your foot on the gas pedal, the revs would drop from 800 to about 500 rpm, then slowly build back up then from 1000 rpm everything would be fine. Below is a list of things I have done so far and I am running out of things to. It will start, run about 2 seconds, then dies. i have a tbi 350 out of a 90's truck in my cj. GM Throttle Body Injection 1987-93 LO3 (5. Mileage down from 13avg to around 8. 188k miles on truck & motor/trans. Performance word which those tiddlers could whisper. this jeep has overheated every single time i've driven it. 3 Stumbles on acceleration, rough running Problem Diagnosis Car Forums it seems to work just fine when it's cold, and as it warms up, the symptoms get. It was getting so hot that it cooked the new engine enamel off some spots of the Intake. Intermittent Rough/Hunting Idle when warm. it runs like a champ and has smoked every truck that i have raced so far. Stocker 350 like you describe should be fine even with a relatively small radiator like a Mustang/Falcon unit. '95 Chevy 350 TBI rebuild woes But she's still running rough. Check Engine soon light returned. r/MechanicAdvice: This is more than a car repair forum! most of the older 305 had bad camshaft wear. If you have the throttle just barely open it will smooth out until it upshifts then it does it again until the rpms build. Get a fuel pressure gauge, attach to fuel rail, turn the key to the on position to allow the fuel pump to prime and DO NOT START, once the fuel pump runs and the pressure comes up (1-2 seconds) the fuel pump shuts off. At 20-30 minutes just shuts off. Wonderful prices of 87 95 and other similar items. If hti sis tbi Chevy Tbi running rich problem solving - Duration: 1985 SBC Chevy Hesitation Bogging Solved GM TBI 350 stalling when starting act like running out of gas when passing somebody and Cutting out under load, surging Other videos for this on my you tube channel. How To Find A Vacuum Leak - EricTheCarGuy. almost dies. After it warms up if it is sitting idling it runs rough as crap and then dies. She recently completed a grant that examines PTSD and co-morbid conditions in OIF/OEF female veterans, and one that examines mild TBI and PTSD in OIF/OEF veterans. Even in warm, but not hot, weather, if I let the truck sit and idle in park for 10-15 minutes, it seams to get "hot" and will start the rough idle. It won't start back (even with ether) for another hour or so and the cycle repeats itself. I put in a new radiator, fan shroud, hoses, coolant and it had no effect. I am stumped on this one, i usually am pretty good at working on vehicles, but i am at a loss of ideas. Rough weather hit a few days after the install and I had to wait for spring to. M116 running rough warm Hello, trying to troubleshoot a problem with my W108 M116- runs fine until properly warmed up then starts to miss and really sound unhappy at idle in drive (waiting at lights etc). i have a chevy 350 5. It seems as though it shut of an on in a split second as im driving it. I let it sit for 15/20 minutes and it starts and runs for 100 yards or so then bogs down again. if its the camshaft you will notice little movement on the rocker arm. 7) by changing the injectors and the use. i don't know what else to replace. Best TBI Mild to Hot Street! This is an excellent street machine engine, with a great OLD SCHOOL SOUND. Nevertheless, the two issues were linked together, because the engine was running on three cylinders. Here is problem: The engine has alot of power, shifts smooth ect. I bought the truck and it was running rough. I have it running better, and I think it was the injectors. 0's, rough idle and stalls out when warm I have been following a number of threads on 6. Did better once warm but stalled a couple of times and not running as smoothly as it. you are supposed to run the motor in all the way and set the idle to 550. It has the automatic 3-speed with overdrive. chevy forum at Car Dealer Forums; Truck runs great, but recently when the engine comes off the enriching circuit. Before it dies it never shows and sign of running rough. Often the first symptom of lean running will be a melted piston and seized motor. i got it running, changed points & cond adjusted the quadrajet, timed it by ear to start warm with 1/2 crank but it sounds like its missing a few cyls. 0) is the same as a 350 (5. The engine would idle perfectly, but as soon as you put your foot on the gas pedal, the revs would drop from 800 to about 500 rpm, then slowly build back up then from 1000 rpm everything would be fine. 0's, rough idle and stalls out when warm I have been following a number of threads on 6. At 20-30 minutes just shuts off. The duty cycle is different for a marine engine, so you would have to modify the ECM software. Page 2 of 3 < Prev 1 2 3 Next >. 350 TBI with turbo 350 trans. 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. If the timing is RETARDED, the engine will run hotter; try advancing the timing. I am getting pitiful gas mileage for a regular cab pickup with a short box and a manual tranny. If you want to live in a society that works for everybody and not just. In my case, about 20 seconds after a carb jet plugged at 3000 rpm and I noticed a power drop off until the motor seized with a broken piston. After doing some checking online I see thermostat temperatures listed for the TBI engines from 160, 180, 192 and 195. I have not yet done the basics but am off to the parts store tonight to get new plugs in hopes that clears the problem. Discuss 1990 TBI 5. Therefore,since it is not reading the A/F ratio you may need more or less fuel for maximum power. It does not take long either. I installed the PCV valve and started the engine and warmed it up and the problem was still there, so I started checking things over making sure all the rubber hoses fit tightly. it has adaptive strategy to learn how to run right. I removed the elbow and used some new vacuum hose between the hard plastic line and TBI. Failed Temp sensor set code. I have a 87 K5 stock 350 with TBI. Here is problem: The engine has alot of power, shifts smooth ect. It runs awful until up to operating temp and still lacks power then. 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. 350 CHEVY HEADS BEST AND WORST. then remove the battery cable for 10 seconds to clear the memory for the computer and then let it run for a while to re learn how to idle. These steps offer a clean install that lends to the look of your lifted vehicle.