I have a 2001 intrepid that has been having a problem with the engine racing while parked. It'll start low, and then climb all on it's own up to 3000 rpm. If we jiggle the car or slam the hood shut, it'll go back down and then climb back up to 3000 again. Is this the IAC? Also, the car is shifting pretty hard. Could these two problems be related? We thought the problem involved the fuel injectors, so I put the fuel injector cleaner in, but now I wonder. Any help would be wonderful!