Why does my Chevy k1500 stall when gas is released?

I have been working on our 89 Chevy K1500 and am still having an idle issue. The truck idle drops and lopes and occasionally completely stalls. This usually happens when driving slow in town… backing out of parking space, letting off gas when coming to a stop sign or to park etc. It does fine to start and accelerate.

What causes a Chevy C / K 1500 to drop in idle?

In order to change these, you have to completely removed the distributor and completely disassemble the distributor to get the pickup off and replace it. These components are very sensitive and when failing, will cause misfire, idle issues, and cause it to burn rich as well. 11 out of 12 issues like this are because of this pickup coil.

Is the oil leaking on my 94 k1500?

Only 108k miles on a 94 k1500 no oil leaks but is using oil like it’s going out the pan with no plug I know my way around this truck n I’ve replaced n checked damn near everything pcv vacumme lines gutted cat which was clogged next is compression test n plugs again …

What makes a rough idle a misfire condition?

What complicates a rough idle/misfire condition is having the PCM not register any specific misfire codes. In my neighbor’s Blazer, the PCM wasn’t even registering a P0300, but it was obviously running very rough (at idle that is).

Why does my C / K 1500 stall at low idle?

This all started after spraying motor down after mudding instant idle issues wanted to stall and would at red lights and stops then it started surging redid the ignition timing fixed the surge now it’s just low idle with stutter and hard to start so really it could be a number of things …. if my ecm was bad wouldn’t the truck not run At all

Why does my 1993 Chevy TBI stall at idle?

Timing is steady and not jumping all over. It is a fuel issue. The only code that ever sets is a P044, lean exhaust, and the exhaust is really lean. We have swapped PCM/PROM with a same year Suburban, no change. Both vehicles run the same as this did using the other’s PCM.

What’s the problem with my Chevy C / K 1500?

Im having an issue with the truck, it runs fine at higher rpms, but if im just barely on throttle a little it bogs and starts to kinda sound like its cammed]

What should the idle speed be on a GM TBI?

Insert a T-30 size Torx driver into the Idle adjustment screw that is located behind the plug removed earlier. Turn the screw to adjust the idle speed to 650 RPM +/- 50 RPM. Turn off the engine and disconnect the negative battery terminal from the battery using a wrench.

Why does my car shut off when stepping on the gas pedal?

received a Car shuts off when stepping on gas pedal Inspection. Rough idling, frequent stalling, and inconsistent acceleration are all signs that something is amiss with your car. There are a number of systems that can cause this problem.

Why is my GMC Sierra 1500 stalling and dying?

There is no code given. Have changed the injectors, timing, fuel tank, fuel pump, fuel pump, map sensor, cooling temp sensor on front of block, rebuilt the tbi, air idea valve. None of this hasite helped. The truck starts and dies. Have to give a little gas to keep running. While driving have to 2 foot it so it won’t die.

What causes hesitation and stumbling in a 1990 Chevy c1500?

An expert that got 10 achievements. Re: 1990 chevy c1500 hesitation and stumbling during… Based on what you said, I would say the engine is starving for fuel. The computer has to be disabled to set timing – there should be a procedure for that. I would start with checking fuel pressure at the throttle body.

What causes a truck to stall when gas is released?

The truck idle drops and lopes and occasionally completely stalls. This usually happens when driving slow in town… backing out of parking space, letting off gas when coming to a stop sign or to park etc. It does fine to start and accelerate. I have done a tune up including oil and filter, fuel filter, spark plugs, wires, cap and rotor.

What happens when the EGR valve gets stuck on a GM 4.3L?

This tutorial addresses a very common problem I’ve seen on the 1987-1995 GM 4.3L, 5.0L, and 5.7L engines with throttle body fuel injection system: a stuck open EGR valve. And when the EGR valve gets stuck open, it’ll cause a rough idle condition that may hard to diagnose.

Why does my Chevy Silverado not idle after a cold start?

My 89 Chevy Silverado would not idle after a cold start I took the PCV valve out and sprayed it with carburetor cleaner….no more problems!!! 5 people found this helpful. One of the MOST overlooked parts of these TBI engines is the distributor pickup coil.

Why does my Chevy truck stall at idle?

Filter is not that old, and if plugged or if pressure regulator is malfunctioning, why do I never see fuel pressure at throttle body so much as waver lower than 12psi? Also, many times the lean condition will start just off idle so bad so that truck wil fall flat on its face and stall.

How can I tell if my idle control valve is working?

To check if an idle control valve is working properly, start by turning on your engine and letting it run for a minute or 2. Then, when it’s at an idling speed, take note of the RPMs in your car. Next, turn the engine off and disconnect the idle control motor under your hood.

What’s the fuel pressure on a 1998 Chevy k1500?

Here are the tests I’ve done so far fuel pressure test, fuel pressure 160psi while running, then shut off for 20 min and fuel pressure was at 155 PSI. Dry Compression test on all 8 cylinders between 150-160 psi.

What causes a 1989 Chev crew cab to stall?

I have a 1989 v3500 chev crew cab with a 454. Started stumbling at low throttle, stalling when I came to a stop or any low rpm activity. Checked for vaccuum leaks, reset base idle, tested sensor components, ran Win aldl diagnostics, could not get it to run right.

What causes a Chevy 350 to backfire when idle?

If a main vacuum hose such as the power brake booster feed line has broken or failing off it will cause a lean backfire due to the additional air allowed into the engine intake manifold. This problem will be accompanied by high or low engine idle and a harder to push brake pedal than normal.

Why does my GMC Sierra 1500 stall while in gear?

Motor wants to stall while in gear (but doesn’t do it out of gear once over 1000 rpm it dosent) seem to stall and it is only from a dead stop. Fuel filter has been replaced and TBI was rebuilt last April but it sort of used to do something like this when it was like 40 degrees or below. Could be torque converter lockup solenoid in the trans.

What causes a Chevy 4.3 engine to stall?

Lack of oil will cause a knocking sound in the engine, stalling, poor acceleration and eventually engine break down. Lack of transmission fluid, battery fluids, radiator and cooling system fluids can all cause symptoms that mimic bad idle air control valves and throttle control switches.

What causes a 1994 Chevy C / K 1500 to bog down?

– CarGurus 1994 Chevy C1500 5.7 bogs/backfires when I give it gas. My truck bogs down (and tries to die) when I give it gas to accelerate off of a stop. There is often a backfire or two when this happens. Pumping the gas does not help. I basically have to crawl through any intersection until it picks up a bit of speed from idle. The truck

When did the Chevy C / K pickup truck come out?

The C/K was Chevrolet’s full-size pickup truck line from October 1959 until 2002 in the United States, from 1964 to 2001 in Brazil, and from 1975 to 1982 in Chile.

When did the Chevy 350 engine become standard?

Beginning in 1985, Corvettes featured a fuel-injected version of the Chevy 350 engine; other passenger cars equipped with the 350 engine continued to use a four-barrel carburetor. Computer-controlled emissions systems became standard on all Chevy 350 engines in the early 1980s, with throttle body fuel injection becoming standard around 1988.

What are the symptoms of a fuel pump relay problem?

1. Engine stalls One of the first symptoms of an issue with the fuel pump relay is an engine that suddenly stalls. If the fuel pump relay has an issue while the vehicle is operating it will cut off power to the fuel pump, which will cause the engine to stall.

How does the fuel pump know when to shut off?

Some vehicles can vary the voltage to the fuel pump to control fuel pressure. In the case of an accident, there are many crash sensors on modern cars that the PCM will monitor. When an accident has been registered, the PCM has the option to cut power to the fuel pump by turning off the fuel pump relay. Was this answer helpful?

What causes a fuel pump connector to go bad?

One of the most common reasons for a connector to go bad is the retention clips. If a connector does not have good retention and a tight connection, it can lead to heat problems. Corrosion on terminals has been an issue recently due to the location of the connector on the tank.

What happens when the fuel pump goes out on a Chevy Silverado?

There are physical signs that you can feel when your Silverado’s fuel pump is going out. Before taking anything apart, check to see if your engine’s computer has any trouble codes saved in it. The engine may throw a P0087 trouble code. This trouble code detects that the fuel rail/system pressure is too low.

What happens when a fuel pump goes bad?

You don’t have to be a mechanic like our team at Wiygul Automotive Clinic to know when a fuel pump goes bad, there will be problems with your vehicle. Fuel pumps quit working for many reasons, but once it happens the fuel injectors will be without fuel and the vehicle will stall.

Why does my Silverado have a trouble code P0420?

If you get P0420 or P0430 trouble codes with a scanner, it very well may be the catalytic converter causing these symptoms. One of the best indicators of a clogged fuel pump is going to be that the your Silverado is difficult to start. This because there’s not enough fuel pressure to properly atomize the fuel as it enters the combustion chamber.

Where does the fuel pump go in a car?

In modern fuel injected vehicles, the fuel pump sits right in the fuel tank and “pushes” the gasoline to the fuel rail (s). It is in the fuel tank because “pushing” fuel to the fuel rail is easier than “pulling” the fuel, which is what an inline pump would do.

What’s the problem with my 1991 Chevy K2500?

I have searched the forums and found similar threads but nothing seems to fix my problem. I have a 1991 K2500 with the 5.7 350 TBI. 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.

Why does my Chevy c1500 not start up?

SOURCE: No fuel to the injectors on a 1997 Chevy c1500. can be the distributor or maybe the fuel pump let the truck sit and then turn key almost on but not enough to initiate start up and see if you hear pump in the gas tank and if thats not it, it could very well be your distributor it might be moist in the cap or button area

What kind of car is a 1994 Chevy k1500?

Chevrolet K1500 4×4: i have a 1994 chevy k1500 5.7 350. the i have a 1994 chevy k1500 5.7 350. the motor had been swapped and almost all the vacuum lines were disconnected/ dry rotted. i hooked them all back up because it had a rough start/ idling problems. no…

When did my 95 TBI Chevy stop running?

Timeline and service related incidents— Little over a year ago, it quit a couple times—I mean locked down like the key was switched off. My local indie tech replaced the distributor (O’Reilly’s).

Why is my Great Lakes 4×4 running rough?

Also, when you idle the ammount of air and fuel mix is small, less air = less fuel needed for lower engine speed. 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.

Why does my Chevy truck run like poop?

Cat was gone when I bought it, so it’s not exhaust restriction. Truck runs like poop when cold, but got a little better when warm…..but here’s something weird he found while scanning—-when cold, the timing was all over the place. He finally decided it had bad gas……

What causes engine to stall when giving gas?

Those screws with the spring are the idle fuel mixture screws. The engine service manual should provide an initial number of turns that they should be backed out. The problem is fuel delivery at WOT, not at idle. Something is preventing the carb bowls from maintaining an adequate fuel level to allow the high speed jets to pick up the fuel.

Can a Chevy C / K 1500 run at idle?

There is often a backfire or two when this happens. Pumping the gas does not help. I basically have to crawl through any intersection until it picks up a bit of speed from idle. The truck idles smoothly, and it runs fine once it’s above about 5-10mph or so. If moving at a picking up the speed.

What causes a Chevy C / K 1500 to bog down?

My truck bogs down (and tries to die) when I give it gas to accelerate off of a stop. There is often a backfire or two when this happens. Pumping the gas does not help. I basically have to crawl through any intersection until it picks up a bit of speed from idle. The truck idles smoothly, and it runs fine once it’s above about 5-10mph or so.

Is the 1990 Chevy k1500 5.7 stalling?

I have a 1990 K1500 pickup with the 5.7L engine that I use as a second vehicle and for hauling. It doesn’t get driven every day and usually it’s only used for short trips but now has a stalling problem that I need to figure out.

Why does my Silverado k1500 stall at traffic lights?

In neutral it will run indefinitely, although it gets a little rough. Pulling a vacuum line will raise the idle, but doesn’t help when you put it in gear. Pulling to a traffic light with the a/c on high, it will idle perfectly for a few seconds, then start gradually dropping, finally shudder and die after 15 -30 seconds.

Why does my C / K 1500 have no power?

I have a ’97 k1500 with a 350 and 4l60e automatic. Assuming all things are OK with the truck, would a bad fuel pressure regulator cause it to have no power at low rpm’s?

Why does my Chevy C / K 1500 bog out under acceleration?

It always bogs under acceleration, wont peel out even when its wet, and must downshift to gain speed on the highway (but it still runs at the normal rpm range when on the highway). 16 people found this helpful.

Why does my Chevy 350 Backfire at high RPM?

The 90 degree elbow in the PCV Valve hose at the base of the throttle body to the PCV valve is common to either fall off or have a hole in it. Most of the time the engine will idle at a higher RPM a suction sound can be heard.

Why does my Ford 89 F150 stall at idle?

The idle was still solid, but it was running rich and >cutting out. >Valve not closing properly) popped up during the KOER test. I replaced >the EGR Valve and it seems to be running much smoother. But, I haven’t >had the opportunity to get it over 45 yet. One good thing is that the >acceleration. It’s not gone, but it is MUCH better.

Why does my car stall when I come to a stop?

Started stumbling at low throttle, stalling when I came to a stop or any low rpm activity. Checked for vaccuum leaks, reset base idle, tested sensor components, ran Win aldl diagnostics, could not get it to run right.

Why does my Chevy k1500 stall when gas is released?