How do you adjust the idle on a 1994 Isuzu 2wd truck?

To adjust the idle on a 1994 Isuzu 2WD truck, locate the idle adjustment screw on the throttle body, usually near the throttle linkage. Start the engine and let it warm up to normal operating temperature. Use a screwdriver to turn the idle adjustment screw clockwise to raise the idle or counterclockwise to lower it, checking the RPM gauge as you adjust. Once the desired idle speed is achieved, make sure to recheck any other engine parameters for optimal performance.