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Message: <blockquote data-quote="ehoe" data-source="post: 43123" data-attributes="member: 141">Yup that happens to me too. It takes several days before the idling returns to normal. What I do is I manually adjust the idling RPM to slightly higher so that it doesn't stall on me during those first few days. Then once the ECU relearns the settings I adjust back the idling to normal. I did hear from a mechanic once before that another way you can do is after reconnecting the battery, start the car up and leave it running at idle for maybe an hour or two and it should re-learn back the settings. Whatever way, there is no 'quick' way of getting the ECU to re-learn so might as well just use the car as normal and let it relearn on its own. Just have to put up with the rough idling for the first few days. Anyone know of a faster way to do the ECU relearning process?</blockquote>