Ok. So after my car warms up and I drive it for a bit; when I come to a stop my rpms bounce from about 1000 to 1500 rpms. Its terrible! I got a tip that it was my "idle-air control valve" so I got one of those from my friend (a used one) and it kept doing the same thing. He said he was pretty sure that the idle-air control valve he gave me was good. So I have no idea. Also when I put on the supposedly "good" valve I also cleaned up my "f.i.t. valve" (fast-idle-throttle i think). And then I made sure that the plastic circular piece inside of the f.i.t. valve was screwed down tight. But still my rpms bounce... Sigh... Should I jus pay $160 for a brand new idle-air valve or could it be something else? Help... Please... I have a head-ache...