Sorry for the dbl post from what Ive read that isnt supposed to be done. Like I said I have never been on a forum before and I have to say you guys are great and very helpful thank you. But todays update is that I replaced the tps because I had a new one inside the car when I got it. The car idled up to 3000 rpm-3300 rpm then the idle hunting began again. I found the brass headed screw at the bottom of the throttle plate but it appeared blocked off on the inside. Anyway I am not sure which one is the IAC on the back of plenum or under the throttle plate?