Dynamic Injection Pump Timing
- Bring engine to normal operating temperature. Stop engine and install Dynamic Timing Meter (078-00200) into timing probe hole until it almost touches vibration damper.
- Attach clamp from Timing Meter Adapter (078-00201) or equivalent to the line pressure sensor on No. 1 injector nozzle ("F" Series) or No. 4 injector nozzle ("E" Series) and connect to dynamic timing meter. Connect dynamic timing meter to battery and dial in minus 20 degrees offset on meter.
- Disconnect cold start advance terminal connector from solenoid terminal. With transmission in neutral and rear wheels raised, start engine. Using Throttle Control Tool (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. Activating cold start advance solenoid terminal 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 the advance is more than one degree, and base timing is within 2 degrees of specification, go to next test. If the advance is more than one degree, and base timing is not within 2 degrees of specification, adjust timing. If problem still exists, go to next test. If the advance is less than one degree, replace injection pump and repeat this test.
NOTE:
Perform this test only if engine has an obvious combustion knock or miss.