Chevy Astro Repair Question :: 2000 Chevy Astro  Idle speed


Author: jstephenjonesj
Subject: 2000 Chevy Astro  Idle speedPosted: Thu Apr 15, 2010 1:19 pm (GMT -8)

Engine Performance problem

2000 Chevy Astro  6 cyl All Wheel Drive Automatic 94000 miles



This problem started about 2 weeks ago.  The engine suddenly started idling at a much higher speed than normal.  After slowing down from driving on the interstate, the engine was still 'pushing'.  After I stopped at an intersection, I put the trans in neutral & the engine speed increased quite a bit (no rpm gauge in instruments).  Enough so that it'll take right off on ya from a dead stop when shifting from neutral to drive.  We were on a short vacation at the time & had a mechanic at a small shop look at it.  He said it was the Idle air control valve.  Soooo, I just replaced that part and it did help some.  I also cleaned off some carbon residue on the 'sealing surface' inside the 'hole' where the valve goes.  But the engine is Still revving to high at an idle.

Please give me a hint as to what to do next to get idle speed back to where it normally is.



Thanks very much

Steve



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