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Message: <blockquote data-quote="96redgt" data-source="post: 605381" data-attributes="member: 11541">I haven't done a tuneup since I got it in February. Its probably about time for one, though. What could be the issues with the IAC, and can it be easily remedied?The Check Engine Light comes on and goes off, but has done that for a while. I will try to get the codes read tomorrow.What is confuses me is that it doesn't do it while its sitting still, idling. It only does it after its been driving for a little while, and/or only after about 1/2 throttle. If I go light on the pedal, it doesn't do it. The moment I try to put the pedal down past 1/2 throttle, it starts.</blockquote>