RE my previous question, engine braking/speed control

Tiny
DUNCAN123
  • 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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Tuesday, April 24th, 2012 AT 9:57 PM

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Tiny
HMAC300
  • EXPERT
  • 45,744 POSTS

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.

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Tuesday, April 24th, 2012 AT 10:41 PM

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