code reader indicated a new mass air flow sensor vehicle did not fix problem on 2000 GMC Yukon XL 1500

replaced MAF sensor,new fuel filter vehicle still hard to start plus runs ragged now diagnosed no codes

by in Ohatchee, AL on November 04, 2012
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1 answer
ANSWER by , November 05, 2012
Use scanner with 'live data' capability for diagnosis , not a code 'reader'. Check for loose pin connections at sensors and for vacuum leaks.