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When cranking the engine all fuel stops?

Tiny
NUNYA56
  • MEMBER
  • 1992 CHEVROLET S-10
  • 100,000 MILES
Replaced fuel relays and installed new fuel pump. With key on fuel pumps good, but when cranking motor all fuel stops.
Wednesday, August 21st, 2024 AT 11:04 AM

2 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

When you first turn the key to the on position, the pump should prime for a second or two then stop.

Fuel will not be sent again until the PCM recognizes ignition and the engine starts.

Let me know what is happening. Are you able to get it to run at all?

Let me know.

Joe
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Wednesday, August 21st, 2024 AT 8:03 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
This can be caused by the ignition module failing, I would see if there is spark. This video can show you how:

https://youtu.be/baq_aEWNQ0Y?si=9Ig8obOtUB0A4R3d

Also, check all fuses to see if any are blown, here are the locations and how to change out the ignition module in the images below in case you need it.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the images (below). Please let us know what happens.

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Wednesday, August 21st, 2024 AT 8:05 PM

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