Dynamic Timing
NOTE:
Engine must be at normal operating temperature of 192-212°F (89-100°C) when checking/setting dynamic timing.
- Warm engine to normal operating temperature. Stop engine and install Dynamic Timing Meter (078-00200) into timing probe hole until it almost touches vibration damper. See Fig 1.
- Attach clamp from Timing Meter Adapter (078-00201) to line pressure sensor on No. 1 injector nozzle (Pickup) or No. 4 injector nozzle (Van), and connect to dynamic timing meter. Connect dynamic timing meter to battery. Dial in minus 20 degrees offset on meter.
- Disconnect cold start advance terminal connector from solenoid terminal. See Fig 2. With transmission in Neutral and rear wheels raised, start engine. Using Throttle Control (D83T-9000-E), set engine speed to 2000 RPM with no accessory load.
- Observe injection timing on dynamic timing meter. Injection timing should be 8.5 degrees BTDC at 2000 RPM. Apply battery voltage to cold start advance solenoid. Energizing cold start advance solenoid can increase engine speed. Adjust throttle if necessary.
- Timing at 2000 RPM should be advanced at least one degree before the timing obtained in first timing check. If advance is less than one degree, replace fuel injection pump top cover assembly. If dynamic timing is not within +/-2 degrees of specification, adjust pump timing.