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pfeiffer_photos
Guest
My Cavalier seems to idle too high when I first start it it. It revs to over 2500 rpm for at least 15 to 25 seconds. It will also idle at 1500 plus when in park when the car is warmed up The check engine light came on and my mechanic checked it telling me the mass air flow sensor gave him a code saying the fuel was not getting enough octane and that is what is causing the car to idle too fast and if I ran premium fuel it will solve the problem. Does this sound correct to any on you mechanics? Thank you.