How do you adjust idle on Mazda 323?

To adjust the idle on a Mazda 323, first, ensure the engine is at operating temperature. Locate the idle adjustment screw on the throttle body; it may be covered by a plastic cap that needs to be removed. Turn the screw clockwise to increase the idle speed or counterclockwise to decrease it, checking the RPM with a tachometer to achieve the desired idle speed. Finally, recheck the idle after a short drive to ensure it remains stable.