1991 Rodeo fast idle

I have a 1991 Rodeo 5 speed with 170,000 miles on it. Recently the idle is going crazy, running around 3000 rpm while driving or when stopped. After driving it floods when shut off. I can't get the idle to go down. Anyone know what may be the problem?

Thanks so much

Typical idle problem that just go up and down by itself is usually caused by a bad TPS (Throttle Position sensor) and another possibility is the IAC (Idle Air Control) solenoid. Both are usually located in the throttle body.

That worked!! Thanks so much. Now I am tackling why the "check engine" light is on..Again Thank you!

let us know what you come up with--as far as the codes. we will try to help.