2005 Chevrolet Impala Q&A
2005 Chevrolet Impala Question: What is the best way to diagnose a bad mass air flow sensor?
If the MAF was the problem, the car should run better with it unplugged, on a GM product. If you can bump it and the engine does better, it is a good sign that something is wrong with it or the connection to it. - ProfessorG