94 b18b1 and i have it idling funny, when it is cold it starts to jump and drop. what to do? I had the pump and timming belt changed but it is still doing it. a friend had adjusted the throttle position sen. (with the tap of a hammer) and it went away, than it came back when the engine warmed up, he said to tap it the other way and play with it, now it sounds good warmed up but back to the cold idle?????