Stalls while driving?

TLPUPS

MEMBER
1994 CHEVROLET SILVERADO
6 CYL
4WD
AUTOMATIC
100,000 MILES

My poor husband and I are beside ourselves with my truck. The issues is when the truck is cold it will start up fine no problem, however when it gets warmed up it starts acting like its running out of gas. We have replaced fule pump, throdle body, distributer and the cap, new spark plugs and wires, fuel injectors, oil change, and oil filter. Can aaaaaaanyone please help in maybe an idea where to turn to next? At this rate we have far more money invested in my truck to just walk away from it now.

3 Replies

JAMES W.

MECHANIC
2,395 POSTS

In your list of replacement parts, I didn't see fuel filter. If the fuel pressure regulator isn't holding enough presure at the fuel rail it will starve the injectors and make it stall. It may sound stupid but, you creating a vacuum in the fuel tank?

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Thursday, September 3rd, 2020 AT 12:48 PM

TLPUPS

MEMBER
2 POSTS

Sorry, Yes the fuel filter when the pump was repaced.

Is there a relay or something that could cause this to happen?

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Thursday, September 3rd, 2020 AT 12:48 PM

JAMES W.

MECHANIC
2,395 POSTS

No, there is no relay I can think of that would cause this. Let's go back to basics.
Do you have, or have you had a "check engine" light?
The engine coolant temp sensor may be giving the computer a false reading saying that the engine is warmer than it is, thus giving the engine too lean a mixture. Please advise, I have an idea but, it rests on the check engine light.

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Thursday, September 3rd, 2020 AT 12:48 PM