How do you adjust the idle speed on a 1986 Chevy Celebrity?

There is a idle screw that you simply tighten to increase the idle speed or unscrew to reduce the idle speed. look under the hood at the throttle linkage.push the gas and let off of it. when you let off look where it comes to a rest. you will see it comes to a rest against a screw. if you want to idle it down just turn it counter clock-wise. i believe it is star shaped. so a regular screw driver wont work. hope that helps. this should be quick and easy 2 min job