1. Bring the engine to operating temperature.
2. Set the parking brake and block the drive wheels.
3. Turn off all accessories.
4. Install a magnetic tachometer.
5. Adjust the low idle speed screw on the side of the injection pump according to the specifications on the vehicle emissions label (refer to Figure 7-80, view A).
6. Remove the electrical connector for the fast idle/cold advance temperature switch and jumper its wiring harness terminals with an insulated wire (see Figure 7-80, view B).
7. Open the throttle momentarily to allow the fast idle solenoid to extend fully.
8. Adjust the fast idle solenoid plunger/screw on the bracket of the injection pump according to the specifications on the vehicle emissions label (see Figure 7-81).
9. Stop the engine.
10. Remove the jumper wire and install the electrical connector for the fast idle/cold advance temperature switch.
11. Remove the magnetic tachometer and wheel blocks.
