i was thinking it wasnt a vaccum leak because my friend has a vaccum leak and it idles nothing like his car. His sort of idles slowly up and down while mine idles very rapidly up and down. Really it doesnt idle up and down that much because you cant even tell by looking at the tach. Also while driving at anything below 2k rpms it is the most jerky drive. I can have the throttle at the same spot and it jumps back and forth untill the rpms get above 2k.