How do you adjust the idle on a 92 Cabriolet?

To adjust the idle on a 1992 Cabriolet, locate the idle adjustment screw on the throttle body or the idle air control valve. Start the engine and let it warm up to operating temperature. Use a screwdriver to turn the adjustment screw clockwise to increase the idle speed or counterclockwise to decrease it, while monitoring the RPMs with a tachometer. Make small adjustments until you reach the desired idle speed, typically around 800-900 RPM for this model.