Got spark and fuel, no start?

Tiny
POOT67
  • MEMBER
  • 1989 GMC C1500
  • 5.7L
  • V8
  • 2WD
  • MANUAL
  • 250,000 MILES
Replaced plugs wires, ICM, cap, rotor, cool and fuel pump. No start.
Wednesday, August 3rd, 2022 AT 8:34 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,300 POSTS
Hi,

If you have spark and fuel, it should run unless compression is too low or there is a timing issue. Also, if the injector isn't getting power, it won't get fuel even if the pump is working.

Do me a favor. See if it starts for a second or two when you use starting fluid. If it does and then stalls, we know its fuel related.

Also, I need you to scan for diagnostic trouble codes. This has an obd1 system that doesn't require a scan tool. All that is needed is a short jumper wire or even a paper clip. Follow the directions in this link and let me know the results:

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

Let me know.

Joe
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Wednesday, August 3rd, 2022 AT 9:57 PM

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