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Backfires

Tiny
MIKE LESLIE
  • MEMBER
  • 1994 CHEVROLET TRUCK
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 197,000 MILES
First crank it up. It runs fine. Seems like the more you drive it. Or hotter it gets. It starts to idle ruff in gear. Then losses power. Causing you to give more throttle. Then pops and sputters. Eventually backfiring out tailpipe
Wednesday, August 30th, 2017 AT 5:48 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,513 POSTS
It sounds like you are losing the fuel pump. Lets start by checking the fuel pressure. Here is a guide to help us get started. If you do not have a fuel pressure gauge you can rent one for free at the auto parts store.

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

and

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

and

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

Please let us know what you find.

Cheers, Ken
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Thursday, August 31st, 2017 AT 10:15 AM

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