does anybody know how to read? he didnt say anything about when his car starts up. All cars idle high when there cold, my integra, mustangs, civics and the rx8 all do it. He is talking about once it is steady and low, it will move a little bit. its just because your car is loud that you really notice it, the rx8 does it quite a bit too (not jump alot, just does it often). Im pretty sure your fine.