Note: Refer to the warning note in Section 1 before proceeding.
Warning: The following procedure will merely relieve the pressure in the fuel system - remember that fuel will still be present in the system components and take precautions accordingly before disconnecting any of them.
1. The fuel system referred to in this Section is defined as the tank-mounted fuel pump, the fuel filter, the fuel injector and the pressure regulator in the injector housing and the metal pipes and flexible hoses of the fuel lines between these components. All these contain fuel, which will be under pressure while the engine is running and/or while the ignition is switched on. The pressure will remain for some time after the ignition has been switched off and must be relieved before any of these components are disturbed for servicing work.
2. Disconnect the battery negative terminal (refer to "Disconnecting the battery").
3. Place a suitable container beneath the relevant connection/union to be disconnected and have a large rag ready to soak up any escaping fuel not being caught by the container.
4. Slowly loosen the connection or union nut (as applicable) to avoid a sudden release of pressure and position the rag around the connection to catch any fuel spray which may be expelled. Once the pressure is released, disconnect the fuel line. Plug the openings, to minimise fuel loss and prevent the entry of dirt into the fuel system.