How do you adjust the fast idle on lancer 2004 4G94 motor?

To adjust the fast idle on a 2004 Mitsubishi Lancer with a 4G94 motor, locate the idle air control valve (IAC) and the fast idle adjust screw, typically found near the throttle body. Start the engine and allow it to reach normal operating temperature, then use a screwdriver to turn the adjust screw to increase or decrease the fast idle speed as needed. Make small adjustments while monitoring the engine speed, and ensure the idle speed falls within the manufacturer's specifications. Always consult the vehicle's service manual for specific adjustment procedures and specifications.