Please remind me what IAC is. D Davis seems to have the same thing (clutch in, rolling@idle)- perhaps it is a loose conn. This only occurs every few days, actually it went several weeks w/o anything happening. I wouldn't be concerned, as it is so infrequent, but in heavy traffic it could cause an accident. In the meantime, I'm checking all the conn's. This is my winter car so things underhood get grungy. Thanks for the input.