My car started idling high after i changed the blower a while back.. (having let the car sit so long i forgot how to adjust anything)... So i have been driving around for a week idling at 2000-then drop to 1200. i backed out the idle screw all the way and made no difference.. hmm i guess thats all i could do.. i forgot all about the IAC adjustment screw.. adjusted that, well turned it all the way in and it brougfht the idle down to 1250- then drops to 1000. what could ben the cause of the high idle.. i cleaned the tbody and that seemed to help.. any ideas..