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smblksrock · 01-25-2009, 10:07 AM

CHECK THE EGR VALVE! At least take it off and clean all the carbon off. Alot of idle issues are egr's leaking or stuck open. This should be your FIRST suspect along with dirty IAC, then go from there.

01-25-2009, 10:07 AM	#145
smblksrock Supporting Member Join Date: Dec 2008 Location: Central Illinois Age: 47 Posts: 65	Re: 1991 chevy 1500 5.7 tbi erratic idle CHECK THE EGR VALVE! At least take it off and clean all the carbon off. Alot of idle issues are egr's leaking or stuck open. This should be your FIRST suspect along with dirty IAC, then go from there. __________________ 93 K1500 Silverado 5 spd OD - Global Warming my A**! -