I cant take this messed up idle anymore. I have to keep the IAC unplugged all the time just to get the rpms not to hang, and most of the time i cant keep it running on cold starts. When i had the IAC plugged it idles too high, rpms hang, idle goes up and down. Also the car runs rich all the time and gets horrible gas mileage. it has NO o2 sensor for some reason, also it is a speed density car. please help!