[Jim Williams]

The idle adjustment screw is on the front (front is the side towards the front of the car) of the throttle body. It is accessible from the left side. Without actually measuring it, it is about 1/2" in diameter with small "flutes" in the gripping surface so you can turn it by hand, alternatively, it also has a flat blade screwdriver slot. Turning counter-clockwise increases the airflow which increases the idle air bypassing the throttle plate, and increasing the idle speed.