Remove the idle air valve from the side of the throttle body. Using some carb cleaner, clean the area in the throttle body as well as the module. Remove all the carbon deposits.
Replace it and start the engine. It will run rough for a bit because of the cleaner. Let the engine get warm
Unplug the IAC motor on the side of the throttle body.
Set base idle with the adjusting screw on the side of the throttle body to 400-450 RPM
Shut the engine off
plug the IAC back in and start the engine. Drive it for about 5 miles to reset the computer.
Shut off the engine. Disconnect the neg battery lead for about 15 seconds.
Let the truck idle for a bit and see how the idle settles in.
If this doesn't work you may have to replace the IAC.
NEVER- NEVER adjust the idle screw on the throttle body unless you follow this procedure.
Sunday, May 7th, 2006 AT 8:30 AM