Question about 1999 Chevrolet Silverado 1500

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I just changed my fuel pump but engine keeps stalling?

I just changed my fuel pump, but my engine keeps stalling. Does anyone know how I can repair this? This is a 1999 Chevy Silverado with a 4.3 engine. Thanks!

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So..... you replaced the pump because it stalls, or it ran ok, and you replaced the pump and now it stalls? Stalls going 50 mph? idle? hot? cold? ck eng light on? codes? Fuel pressure?

Posted on May 14, 2010

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Maintenance
Start with the fuel filter. Sounds like its on its way to the big filter bin in the sky.

Posted on Sep 04, 2010

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I need much more information to answer your question. Is this problem constant? Is the engine light on or did you retrieve any engine code/s.
If so what are the digits?
What is the history of the truck? The truck is 11 years old, what is the mileage on it? Does the engine use oil? Could be a clogged CAT.
When does it stall? Does it matter if the engine is hot or cold?
Does the engine idle smooth or rough? Is there a misfire?
Have you checked the engine out for any noticeable problems? Maybe a broken vacuum line or sensor, or faulty wiring.

Posted on May 14, 2010

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2002 gmc tracker 4 cylinder code p0409 and p0422 p0449 engine stall wen hot

Posted on May 02, 2013

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SOURCE: I just changed my fuel pump but engine keeps stalling?

take the gas filter off, and blow through it, if it feels restricted, replace it.

Posted on May 14, 2010

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Has anyone experienced this before?


Engine Stalls

taken from:
http://flashoffroad.com/Diesel/troubleshoot/troubleshoot.htm
Here is an easy way to zero in on a stalling problem.
If it feels like someone reached over and turned off the key and it fires back up right away it's the injection pump.
If the same thing happens but it has to cool down before restarting it's the PMD / FSD(pump mounted driver).
If it stumbles and than stalls then it is air in the fuel lines. If it is this one try switching fuel tanks and just turn the key to run but don't start the engine. Listen to the fuel pump for a change of noise pitch. The pump is really loud when the pump is out of fuel and will have a muffled sound when pulling fuel. Sometimes the baffle in the main tank will brake away from the tank and the pump will suck air when the tank is just off full.
Also check for vacuum lock. If the fuel tank vent is plugged air can't get into the tank to replace the fuel that's drawn out. Remove your fuel cap and see if the truck runs.

Apr 04, 2015 | Cars & Trucks

1 Answer

Why does 1992 isuzu trooper runs for a few seconds then stalls and won't keep running? I've replaced the fuel pump,fuel pressure regulator,and fuel filter. Spark plugs and wires have been changed also


hot or cold engine or both?





which engine, to work on one, you need to know what it is

and what EFI system it uses. or its all just a crap shoot.

no new distributor cap and rotor why skip the full tune up,. why?



first questions.

1: can you save the stall with a a fast right foot.

2: why change out pump etc, if fuel pressure is at spec, a $20 tool would have saved you 5 hours hard labor and bath in fuel? why?





Stalls 101.:



the engine can stall for over 50 reasons are you going to do all 50?

surely not. why not consider diagnosis.. as a path.

1: car stalls, right foot saves it. and can drive fast if i keep foot busy.

a: ISC stuck closed.

b: EGR valve stuck open (depends on which engine options)

c: low compression on one or more cylinders.

2: can\'t save it from stalling (right foot)

a: fuel pressure is low. (wires bad.)

b: lost spark, for any reasons.

c: lost 12vdc to the EFI system( killing spark and fueling)



stalls.

hot or cold or both

stalls, can save it or not, hot and cold

hot restarts are easy and it runs good hot,yes./no.



there is lots more to it, then just stalls. lots more.

Aug 28, 2014 | 1992 Isuzu Trooper

1 Answer

Hyundai excel engine keeps stopping


I've heard of an excel with problems with the signal from the computer not keeping the fuel pump on, if I recall, that was on a '91 excel. To check yours, you would need to monitor the fuel pressure with a fuel pressure gauge, when the car was running, and still hooked up when the car strops running. If the pressure drops when the car stalls, you know you have a problem in the fuel pump circuit. The owner of that '91 excel had replaced the computer once, and believed he needed another. Don't know if this is your problem, but a good place to start is with the fuel pressure test, especially right after the car stalls. If it turns out not to be fuel related, then probably something in your ignition.

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Engine Stalling


Check fuel filter and fuel pump pressure if nothing change explain with more fetail

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You might also want to check your fuel filter and your fuel pump for proper operation before going on so that you dont spend more for uneccessary repairs.

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1 Answer

I just changed my fuel pump but engine keeps stalling?


take the gas filter off, and blow through it, if it feels restricted, replace it.

May 14, 2010 | 1999 Chevrolet Silverado 1500

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Your problem sounds like you have a bad crankshaft position sensor. You will not get a trouble code (check engine light). This will cause the vehicle to suddenly stall. You cannot change the idle on this vehicle, or any FI modern vehicle contrary to a previous post. It is controlled by the engine management computer by way of an idle air control circuit on the throttle body.

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