Had a intake gasket failure and replaced gaskets from the heads up. Started up and idle was so high I was nervous it would over rev. Also have a knocking sound like a exhaust leak at first and then goes away after about 30 seconds of running with the cycling fast idle. Thanks!
Fast idle cycling from 1500 rpm's to 2500 rpm's on 2002 Chevrolet Blazer
by Pappys32 in Flint, MI on March 09, 2013