Will not fire or get gas

Tiny
WESLEY LESTER
  • MEMBER
  • 1994 GMC C1500
  • 5.7L
  • V8
  • 2WD
  • 200,000 MILES
I have changed the ignition control module pick up coil the coil. What else could it be?
Saturday, November 28th, 2020 AT 12:22 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi,

First, have you checked the ign/ECM fuse along with the injector fuse? See pic 1 below and let me know if you checked them. If you did, make sure there is power to them.

Here is a link you may find helpful:

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

Also, if you haven't already, check to see if there are diagnostic trouble codes stored. This has an OBD1 system which doesn't require a scan tool to retrieve codes. Here is a link that shows how it's done. All you will need is a short jumper wire or even a paper clip.

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

Let me know what you find or if you have other questions.

Take care,
Joe
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Saturday, November 28th, 2020 AT 9:35 PM
Tiny
WESLEY LESTER
  • MEMBER
  • 1 POST
I have checked all of this it doesn't show any codes.
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Tuesday, December 1st, 2020 AT 10:40 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Is there power to the fuses I suggested checking?

If you have, then I need you to check for power at the gray wire on the pump. Note there is an inline fuse that could be blown. See attached pic. Also, confirm there is power to the orange wire at the fuel pump relay.

I also want to note that if there is no oil pressure being indicated, it will shut down the pump, so check to make the oil pressure sender is connected.

Next, confirm power to the pink wire on the positive side of the coil. It comes from the ignition switch. Check that when cranking. If it is lower than 10.5v, see if the battery is weak. (pic 2)

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-wiring

One last thing, I have seen the distributor gear at the bottom of the distributor break. Confirm the rotor is turning when cranking the engine.

Let me know what you find.

Joe

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Tuesday, December 1st, 2020 AT 7:17 PM

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