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International Automotive Technicians Network
Re: 2002 chevy van with 5.7L. both banks lean
Posted to Technical Discussion Forum on 11/11/2012

First reset trims hard then road test my thoughts are MAF skewed. recently I had a truck that was a 2-3 stage issue

01 SIlverado came in ECL running poorly lots of stumbling. trims Negative FPR leaking brought trims from +20 to +11-13 cruise. Found intake le... Login to read more.