Engine misfiring?

1993 CHEVROLET CHEYENNE
180,000 MILES • 4.3L • 6 CYL • 2WD • AUTOMATIC
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GSILVA
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  • 5 POSTS
I am still trying to solve my problem, this truck seems to have different symptoms all the time, for example, i can start it sometimes and it runs fine, and other times i start up and it feels like it's skipping. The times that i startup and it's fine i can step on the gas with no problem, the other times when the skipping comes back it feels like a misfire problem. Everything in the ignition system has been changed and still have a problem.
Nov 20, 2023 at 11:11 AM
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JACOBANDNICKOLAS
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Hi,

This could be the result of a few things. For example, a partially plugged catalytic converter, an engine vacuum leak, fuel pressure out of specifications, engine compression, and the list goes on.

Do me a favor. If you haven't already, check to see if there are diagnostic trouble codes stored. This vehicle has an OBD1 system and doesn't require a scan tool. All you will need is a short jumper wire or even a paper clip. Follow the directions in this link 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

Take care,

Joe
Nov 20, 2023 at 7:38 PM