Thread: Idle air valve replacement 2001 3.1 liter

Well that isn't the only possible problem to an abnormally high idle. I'd check for vacuum leaks first. Although, 3,900 is very high even for a vacuum leak. But at that high, you'd easily hear a sucking sound. If you're sure it's the IAC, it will be on the throttle body assembly somewhere.
I tried looking up a diagram but only found these interesting pages and simple instructions.
Removal & Installation

1. Turn OFF the ignition.
   
2. Disconnect the Idle Air Control (IAC) valve.
   
3. Remove the 2 screws that retain the IAC valve.
   
4. Remove the IAC valve.
   
5. Remove the IAC valve O-ring.

To install:

1. Install the new IAC valve O-ring.
   
2. Install the IAC valve in the intake manifold.
   
3. Install the 2 screws that retain the IAC valve and tighten to 27 inch lbs. (3.0 Nm).
   
4. Connect the electrical connector to the IAC valve.
   
5. The Powertrain Control Module (PCM) will reset the IAC valve whenever the ignition is turned ON, then OFF . Turn the ignition ON for 10 seconds, then OFF for 5 seconds.
   
6. Start the engine and allow the engine to reach a normal operating temperature.

Delmar | Cengage Learning
Delmar | Cengage Learning
Delmar | Cengage Learning

Be careful with the bolts holding it to the throttle body. They are a very soft metal and the torx head will strip real easy.