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

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
replaced MAF sensor,new fuel filter vehicle still hard to start plus runs ragged now diagnosed no codes
(1) Answer
Use scanner with 'live data' capability for diagnosis , not a code 'reader'. Check for loose pin connections at sensors and for vacuum leaks.