My standard injection pinto wont idle steadily. It keeps hunting up and down the revs. What could be causing this?
I have been told it may be the idle control valve which has a problem and will be removing it and giving it a clean but should i check anything else.

ICV or an air leak.

I should have a spare ICV or two

they've been off the car for a few years now nut they might be woth a shot if you can't find any air leaks

[Edited on 10/5/2011 by mcerd1]

Clean the idle controle valve and the throttle butterfly with carb cleaner. If that doesn't help check for inlet air leaks.