- Set the parking brake and block the wheels.
- Place the transmission in neutral.
- Connect a tachometer.
- Start the engine and allow it to run until it reaches normal operating temperature.
- Apply vacuum to the fast idle actuator.
- Loosen the locknut on the fast idle adjusting screw and adjust the knurled nut to obtain the fast idle speed specified on the emission label. After adjusting, retighten the locknut.