almost sounds liek the engine isnt warmed up properly and its trying to do just that.. when this happens (revs up to 1800) is the temp guage where it should be?? or is it still cold?? if you have a temp guage anyways..mjb92761 said:the emc was already changed because we thought that was the problem. and still the idle didn't change, it did for a day, but went right back to it the next. Yesterday it was 60 here and i didn't have a problem, today it was 20 and it went right back into racing mode again. Why does the cold make it run faster????