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Erratic idle and loss of power in gears?

Tiny
MADISENCHEVELLE
  • MEMBER
  • 1992 CHEVROLET TRUCK
  • 5.7L
  • V8
  • 2WD
  • MANUAL
  • 108,648 MILES
The idle is erratic, up and down. Then suddenly it will shut off. Go to take off it bucks and stalls causing to change gears early.

1992 Chevrolet c3500.
Wednesday, April 5th, 2023 AT 6:17 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

Have you tried to retrieve diagnostic trouble codes? This truck has an OBD1 system that doesn't require a scan tool to retrieve codes. All you need is a short jumper wire or even a paper clip. Here is a link that explains how it's done. Try this and let me know what you find.

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

Also, let me know if there are any odd odors or smoke, and if the exhaust is blue, black, or white.

Take care and let me know what you find.

Joe
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Wednesday, April 5th, 2023 AT 8:49 PM

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