1. Locate the idle air control valve (IACV). It is usually located on the throttle body.
2. Disconnect the electrical connector from the IACV.
3. Use a flat-head screwdriver to turn the idle adjustment screw clockwise to increase the idle speed or counterclockwise to decrease it.
4. Reconnect the electrical connector to the IACV.
5. Start the engine and let it warm up to operating temperature.
6. Check the idle speed with a tachometer. It should be between 650 and 750 RPM.
7. If necessary, repeat steps 3-6 until the desired idle speed is achieved.
