Fuel injection system - depressurisation

Fuel system: single-point injection models / Fuel injection system - depressurisation

2 Refer to Section 5 and locate the fuel pump relay. Remove the relay from its socket, then crank the engine for a few seconds. The engine may fire and run for a while, but continue cranking until it stops. The fuel injector should have opened enough times during cranking to considerably reduce the line fuel pressure.

3 Switch off the ignition ,then disconnect the battery negative cable and position it away from the terminal
4 Place a suitable container beneath the connection/union that is to be disconnected, and have a rag ready to soak up any escaping fuel not being caught by the container.

5 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 has been released, disconnect the fuel line completely and insert plugs to minimise fuel loss and to prevent the entry of dirt into the fuel system.