Ok.. craziest thing... I got my car back about a week ago, but now the problem isnt tha its ideling high, now its ideling too low. To low that it cuts off... Something is seriously wrong now... i can start the car and rev it up, but it sounds ugly almost like something is caught in the exhaust, and it wont rev up past 4.5k. Spark Plugs are good... I have no clue what to do. The engine while being rev'd up to stay on, almost sounds like lawn mower.