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While driving the engine backfire and shut off, will not start?

Tiny
CBRADIO.COM
  • MEMBER
  • 1991 CHEVROLET 3500
  • 7.4L
  • V8
  • 2WD
  • AUTOMATIC
  • 400,000 MILES
Was driving my vehicle listed above c3500 60 when I heard a backfire and then the truck just quit running. Had plenty of fuel in throttle body (maybe too much fuel) kind of weak fire. Replaced rotor button cap and coil. Great spark and still fuel in throttle body (a lot of fuel). But it will not start or run.
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Tuesday, September 27th, 2022 AT 4:28 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
How does the engine sound when cranking over, normal? If you can upload a short video of the engine cranking, I can tell if the engine is okay. Also, turn the ignition key on without cranking it over. Can you hear the fuel pump come on for about 5 seconds in the fuel tank?

This guide can help:

https://www.2carpros.com/articles/car-not-running-advanced

Also, let's run the codes please follow this guide:

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

Please go over these guides and report back.
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Wednesday, September 28th, 2022 AT 4:32 PM

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