When I crank it, ideal is high and stays that way. How to fix the problem ! on 1990 Toyota 4Runner

Somebody please help! how do i ideal my truck down?

Asked by for the 1990 Toyota 4Runner
3 answers
scan codes and or have a smoke test done to determine source of leak
4 or 6 cylinder engine???? While we are at it, manual or auto transmision???? "I" would just like to know!
It must be sucking air somewere under intake manifold or intake area