Fuel System Priming - Diesel
WARNING: This page is about a different variant/trim than selected.
- A certain amount of air may becomes trapped in the fuel system when fuel system components on the supply and/or high-pressure side are serviced or replaced. When air becomes trapped in the system, it may be necessary to prime the system before starting the vehicle. Fuel system priming can be accomplished by using the vehicle's in-tank electric fuel pump (lift pump).
- The in-tank electric fuel pump (lift pump) is self priming: When the key is first turned on (without cranking engine), the pump operates for approximately 30 second and then shuts off. The pump will also operate for up to 25 seconds after the starter is quickly engaged, and then disengaged without allowing the engine to start. The pump shuts off immediately if the key is on and the engine stops running.
- Turn the key to the "Run" position. If the vehicle is equipped with a push button start, press the start button 2 times, without pressing the brake pedal, to place the ignition in run. The in-tank electric fuel pump (lift pump) will operate for approximately 30 seconds.
- Turn the ignition to the OFF position, and leave it off for at least 5 minutes. Repeat Step 1.
- Fuel system priming is now completed.
- Attempt to start engine. If engine will not start, proceed to following steps. When engine does start, it may run erratically and be noisy for a few minutes. This is a normal condition. CAUTION:
Do not engage the starter motor for more than 30 seconds at a time. Allow two minutes between cranking intervals.
- Perform previous fuel priming procedure steps using fuel transfer pump. Be sure fuel is present at fuel tank.
WARNING:
The fuel injection pump supplies extremely high fuel pressure to each individual injector through the high-pressure lines. Fuel under this amount of pressure can penetrate the skin and cause personal injury. Wear safety goggles and adequate protective clothing. Do not loosen fuel fittings while engine is running.
WARNING:
Engine may start while cranking starter motor.