Fuel System, Bleeding

Fuel System, Bleeding

After installing the high pressure pump, it must be filled with fuel before starting the engine. Do not run it when it is dry.

• When installing the high pressure pump, make sure that no dirt enters the fuel system.

• Only remove the plugs right before installing the fuel lines.

• The fuel tank must be filled.

To fill the high pressure fuel pump with fuel, proceed as follows:

- Connect a battery charger.

- Disconnect the connector to the fuel pressure regulator valve (N276) to prevent the engine from running when cranking the starter.

- Crank the starter three times for 13 seconds each. Allow 20 seconds between each cranking attempt. Otherwise the starter could overheat.

- Connect the connector to the fuel pressure regulator valve.

- Erase the diagnostic Trouble Code (DTC) memory with a scan tool. Refer to => [ Engine Control Module DTC Memory, Checking and Erasing ] Scan Tool Testing and Procedures.



- Start the engine.

- After bleeding the fuel system, let the engine run at a moderate speed for a few minutes and then shut it off.

- Check the fuel system for leaks. Refer to => [ Fuel System, Performing Leak Test ] Fuel System, Performing Leak Test.

- Follow the applicable safety precautions when performing a road test. Refer to => [ Safety Precautions ] Diesel Fuel Injection.

- Test drive the vehicle a minimum of 20 km/h and use full throttle at least one time. Then check the high pressure area one more time for leaks.

• If there is still air in the fuel system, the engine may switch to emergency mode during the road test. Stop the engine and erase the DTC memory. Refer to => [ Engine Control Module DTC Memory, Checking and Erasing ] Scan Tool Testing and Procedures. Then continue the road test.