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Hello , my car was reading code P2179 and was running fine " system to lean " . Today when I started the car it started to idle roughly going at 1.5k rpm and down and up and down . The check engine light was blinking instead of being steady like before. I got the car towed to GM shop. What could this be . One of my friend was saying the M.A.F would do that . Anyone ever heard of that problem . Thanks
 
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