You have 1998 rodeo and cant get rpms below 2200 while idle and almost 3000 rpms in gear replaced computer and other parts anyone have an idea where to buy one?

sounds to me like your base idle..... check your throttle body 1st, make sure the throttle butterfly is going back to it's stopper.... if so your base idle can be a bit hard describe with out showing... try googleing it maybe:)