While making minute adjustments to fuel injector timing is your Dodge computer's primary means of controlling air/fuel ratio, the idle air control valve (IAC) is an equally important factor at idle. The IAC is essentially a precisely controlled air leak that allows the computer to make small adjustments to airflow while the throttle plate is closed. A dirty or clogged IAC can cause stalling immediately after starting, stalling on deceleration, unstable idle and a high or low idle. Fortunately, cleaning the IAC is a fairly cheap proposition that shouldn't take you more than 20 minutes.
Disconnect the truck's negative battery cable to prevent shorting during service.
Identify the IAC motor. Follow the airbox-to-engine tube to the throttle body, and look on the driver side of the throttle body for a one-inch-diameter cylinder poking out of the side. This is the IAC motor.
Unplug the IAC motor wiring harness. You may need to use a flathead screwdriver to pry it loose. Loosen the hose clamp that secures the intake tube to the throttle body and pull the tube free.
Twist the throttle lever to open the throttle plate as far as it will go (fully horizontal), and tie it in place with your length of wire or string.
Remove the two bolts that secure the IAC motor to the throttle body, and gently pull the valve assembly free.
Attach the straw to your can of throttle body/carburetor cleaner, and insert the straw tip into the idle air channel in the throttle body. The cleaner should squirt in a powerful stream out of the vent hole in the bottom of the throttle plate bore, so do what you can to catch the liquid and any carbon debris with your rag before it goes into the engine.
Soak your wire bottle brush with cleaner and run it into the IAC channel as far as it will go. The bottle brush may protrude into the throttle bore, depending on the brush head size. Scrub the brush back and forth while periodically spraying cleaner into the hole. Continue doing so until you're confident that it's clean.
Clean the cone-shaped head on the IAC motor with throttle body cleaner, the wire brush and rag. You may need to soak the valve head in cleaner for a few minutes to completely rid it of varnish. Dry the valve head, IAC port and the inside of the throttle bore with your rag.
Reinstall the IAC valve in the reverse order of removal. Tighten the bolts to 15 foot-pounds, remove the string/wire, plug the harness back in, reinstall the intake tube and reconnect the battery cable.
