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Fuel problem

Tiny
FELIPE501
  • MEMBER
  • 1991 CHEVROLET SILVERADO
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
When the engine idle I can press the pedal and runs great, but when I test drive it it seems like it is not getting gas. Would like to know how the fuel pump works when I test drive it, thank you.
Thursday, March 14th, 2019 AT 6:26 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good evening,

The fuel pump works the same at idle as it does under load.

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

It may not be the pump. It could be something else such as a clogged catalytic converter not allowing the engine to breathe.

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Roy

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Thursday, March 14th, 2019 AT 6:38 PM

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