How do you set the idle on 91 geo storm?

To set the idle on a 1991 Geo Storm, first, ensure the engine is at normal operating temperature. Then, locate the idle adjustment screw on the throttle body, and using a tachometer, turn the screw to adjust the idle speed to the manufacturer's specified RPM, usually around 800-900 RPM for this model. After adjustment, double-check the idle speed and ensure the engine runs smoothly. Always refer to the vehicle's service manual for specific details and specifications.