Mechanics

RE- MY PREVIOUS QUESTION,ENGINE BRAKING/SPEED CONTROL

1998 GMC Jimmy • 228,000 miles

I had considered low compression, but would that cause speed creep and high rpm at idle [ie. My foot is off the gas]?Also car has lots of getup and go, that does not sound like low compression to me?
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Duncan123
April 24, 2012.




Try cleaning the throttle plate on both sides with choke cleaner, they stick. Also clean iac valve hole. Check for a vacuum leak while under hood with choke cleaner.

Hmac300
Apr 24, 2012.


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