try and start the engine there was a small "backfire" the engine won't start

1996 CHEVROLET TAHOE

220,000 MILES • 5.7L • V8 • 4WD • AUTOMATIC

PDXSCOTT

MEMBER
1 POST

After using some starting fluid to try and start the engine there was a small "backfire" the engine won't start. At the same I lost power to my fuel pump. Now even with an alternate power source to the fuel pump the engine still will not start. What should I do next?

Apr 21, 2020 at 9:27 AM

ASEMASTER6371

✓Experienced Mechanic
52,796 POSTS

Good morning,

Is the check engine light on? If it is, do you know the code?

If it backfired, you have spark, just at the wrong time.

https://www.2carpros.com/articles/engine-backfires-while-running

I would start with checking the compression to be sure the timing chain has not jumped.

https://www.2carpros.com/articles/how-to-test-engine-compression

Do you hear the fuel pump run for 2 seconds with the key on? Can you test the pressure?

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

I attached a wiring diagram of the fuel system for you. Do you have a test light or voltmeter to do some testing?

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

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

Roy

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May 4, 2021 at 5:42 AM

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