engine problems

1992 GMC SIERRA
240,000 MILES • V8 • 4WD • MANUAL
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BIGJOHN1991
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  • 1 POST
i have a 1992 gmc z71 5 speed. well when i put it in frist and strat going thean shift in too 2nd my rpms strat jumping and the engine goes crazy like it doesnt wont to go. i chaged the plugs and cap and the sending unit and its still doing it
Jan 25, 2011 at 9:36 PM
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MENDOZA__
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  • 20 POSTS
As far as the rpms goining crazy you might also want to check the egr valve if equiped with one and the idler control module as well. Those two things can have a huge affect on the idle of the vehicle. The idler control module should be located at the throttle bottle of the intake, but do not mistake the module for another. The best way to go at it if your unfamiliar with how is looks is looking the part up on google, then maby you might find a diagram of where exacly it is located.

Hope this helps!
Jan 25, 2011 at 9:50 PM
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