Fuel problem

1991 CHEVROLET SILVERADO
200,000 MILES • 5.7L • V8 • 2WD • AUTOMATIC
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FELIPE501
  • MEMBER
  • 17 POSTS
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 .
Mar 14, 2019 at 11:26 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 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

Mar 14, 2019 at 11:38 AM
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