Power loss after engine has warmed up

Tiny
GRIZZLYDAN
  • MEMBER
  • 1994 CHEVROLET SUBURBAN
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 250,000 MILES
My vehicle loses power while driving when it warms up but when I stomp the gas it goes back to normal for about under a minute then starts losing power again.
Wednesday, February 10th, 2021 AT 12:09 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,772 POSTS
Hi,

That could be a few different things. It could be related to fuel pressure, a partially plugged catalytic converter, and so on. Do me a favor. I need you to check for diagnostic trouble codes. This has an OBD 1 system which doesn't require a scan tool to retrieve codes. All you will need is a small jumper wire or even a paper clip.

Here is a link that explains how to do it. If you find there are codes, let me know what they are and I'll be better able to direct you.

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

Let me know what you find or if you have other questions.

Take care and God Bless,

Joe
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Thursday, February 11th, 2021 AT 4:32 PM

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