Please help me (fuel)😭
Thread Starter
5th Gear
Joined: Aug 2024
Posts: 5
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Please help me (fuel)😭
So I have a 94 Base, earlier this year it started randomly shutting off and wouldn’t start after sitting for a few hours. Or it would start directly after but as soon as i put it in gear it would stall. I assumed my TC was locking up causing the engine to stall as i still had complete power to the car, my radio does shut off and turn back on when this happens. I was having a ton of transmission issues anyways so i got it rebuilt only for it to keep doing the same thing. checked my fuel pressure (39psi at idle) then my fuel pressure starting dropping, and then the car would stall. Assumed it was the fuel pump so i replaced it and the sock. only for it to continue to do the same thing. Also it will crank with starting fluid. At this point im very lost and am wondering if anyone has any ideas
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From: LeClaire Iowa
Please explain in more detail the pressure dropping. You said 39PSI at idle then "while still running?" it drops and the car stalls. What happens when you try to start back right away? With the key on does it prime and pressure build up? How long does it stay up after turning off? Does your pressure regulator vacuum line smell like gas? Pumps have been bad out of the box. Dan
Thread Starter
5th Gear
Joined: Aug 2024
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(Please explain in more detail the pressure dropping.) When i go to crank it, it just cranks, its acting like it’s not firing (opti, plugs and wires) are relatively new. It will NOT prime after it stalls. I will need to check pressure again to see if it’s building pressure after it stalls.
Last edited by that94vette; Aug 15, 2024 at 10:51 AM.
Thread Starter
5th Gear
Joined: Aug 2024
Posts: 5
Likes: 0
Please explain in more detail the pressure dropping. You said 39PSI at idle then "while still running?" it drops and the car stalls. What happens when you try to start back right away? With the key on does it prime and pressure build up? How long does it stay up after turning off? Does your pressure regulator vacuum line smell like gas? Pumps have been bad out of the box. Dan
Moderator, Tech Contributor
Joined: Sep 2013
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From: Cape Coral, Florida
So I have a 94 Base, earlier this year it started randomly shutting off and wouldn’t start after sitting for a few hours. Or it would start directly after but as soon as i put it in gear it would stall. I assumed my TC was locking up causing the engine to stall as i still had complete power to the car, my radio does shut off and turn back on when this happens. I was having a ton of transmission issues anyways so i got it rebuilt only for it to keep doing the same thing. checked my fuel pressure (39psi at idle) then my fuel pressure starting dropping, and then the car would stall. Assumed it was the fuel pump so i replaced it and the sock. only for it to continue to do the same thing. Also it will crank with starting fluid. At this point im very lost and am wondering if anyone has any ideas
If after changing the fuel pump pressure continues to be low you will have to do a voltage drop check on both the positive and negative side of the fuel pump circuit.
Thread Starter
5th Gear
Joined: Aug 2024
Posts: 5
Likes: 0
[QUOTE=C5 Diag;1608083749]If after changing the fuel pump pressure continues to be low you will have to do a voltage drop check on both the positive and negative side of the fuel pump circuit.
It dropped once and caused the car to stall, i just did the filter and it shut off without pressure dropping so now im confused.
It dropped once and caused the car to stall, i just did the filter and it shut off without pressure dropping so now im confused.
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