Priming the Fuel System

Priming the Fuel System - Ops

Prime the fuel system as follows:

  1. Operate the hand primer on module for three minutes or 250 strokes, or use an external priming source such as tool J-47912 or ESOC 350.
  2. Crank the engine for 20 seconds.
  3. Wait 60 seconds for the starter to cool down.
  4. If the engine does not start, repeat step 2 and step 3. The starting cycle can be repeated up to three times.
  5. If the engine still fails to start, continue as follows:
    1. Use DDDL to check for fault codes, repair as necessary.
    2. Repeat step 2 and step 3.

    6. Warning: ENGINE EXHAUST

    To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic.

    Warning: PERSONAL INJURY

    To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked.

    Notice: If no oil pressure is shown after approximately 10 seconds, stop the engine and determine the cause. Running the engine with no oil pressure could result in engine damage.
  6. Start the engine with the accelerator pedal in the idle position. Monitor the oil pressure gauge or indicator lamp. Keep the engine running at idling speed until the oil pressure reading is 14 psi (97 kPa) or more.
  7. Allow engine to reach operating temperature 60ºC (140ºF).
    8. Notice: Increasing engine speed above idle before oil pressure has stabilized may cause severe engine damage.
  8. Increase engine speed to 1800 rpm for three minutes.
  9. Return the engine to idle and allow to idle for approximately one minute, then shut down the engine.
  10. Check for leaks. Repair if necessary.
Note:
Parent topic: Fuel System Checks
Document Number: 0000022281
Manual Publication Date: 2024-01-05
Topic Publication Date: 2025-12-03