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High idle, running rich and the fuel pump is whining

Tiny
JESSICA LAUBY
  • MEMBER
  • 1992 CHEVROLET LUMINA
  • 3.1L
  • V6
  • 2WD
  • AUTOMATIC
  • 167,000 MILES
Use to stall during low rpm's then one day wouldn't start. Changed TPS, MAP, idle air valve, fuel pressure regulator, plugs, wires, fuel rail gaskets, fuel pump and now it's idling high, running rich and the fuel pump is whining.
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Sunday, July 7th, 2019 AT 1:36 PM

3 Replies

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

The fuel pump whining is no good. That is a sign of a bad fuel pump. It should make no noise at all.

As far as the high idle, did you check for vacuum leaks in the system?

https://www.2carpros.com/articles/engine-idles-too-high

Make sure the EGR valve is not open. If it is, that is a big vacuum leak.

Are there any codes set?

As far as running rich, did you check the injectors?

https://www.2carpros.com/articles/how-to-test-a-fuel-injector

Roy
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Monday, July 8th, 2019 AT 4:13 AM
Tiny
JESSICA LAUBY
  • MEMBER
  • 2 POSTS
It's a new fuel pump, but I also found out my buddy didn't put the sleeve on it. And I don't have access to an old version of code reader. These don't have the hookup for the new ones.
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Monday, July 8th, 2019 AT 1:48 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Does not matter if the fuel pump is new, it should not make any noise at all.
.
Roy
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Monday, July 8th, 2019 AT 6:26 PM

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