Check it out....lately but not all the time when i start my car the tach will jump from 500-1250rpms about 3 times. I remember reading about what causes it to happen and don't remember and don't feel like searching. I know i am in dire need of tune up. I am getting the timing belt, water pump, valve adjustment, timing adjustment, new spark plugs, and spark plug wires, etc...next week. So just some helpful clues or ideas would be nice THX:thumbup: