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Old 02-02-2012, 11:37 PM   #8
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Could be the tune, but first do what Tom said and see if it causing a CEL, if it does then your car is not tuned and it's something else wrong. If it doesn't come on then the car has a tune on it, and you will have to go to the dealership to get it flashed back. Did you buy the car used? If you did, did the PO give you the tuner with the car? If he did, then use the tuner to flash it back to stock. If you don't and let the dealership flash it then you may not be able to put the aftermarket tune back on it, but I'm not 100% sure on that. Most of us get them tuned because it greatly improves driveability.
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