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Checking fuel pump capacity, V6.

Checking fuel pump capacity, V6.

Warning

Checking the capacity of the fuel pump involves partial dismantling of the car's fuel system. The following points must therefore be observed in connection with this work:

• Work only in a well-ventilated area! If approved equipment for the extraction of fuel vapours is available, be sure to use it.

• Wear suitable gloves! Prolonged contact with fuel can cause skin irritation or dermatitis.

• Keep a class BE fire extinguisher near at hand! Be mindful of the danger of sparks caused by short circuits and when connecting and disconnecting leads in electrical circuits.

• No smoking anywhere in the vicinity.

• Wear protective goggles.



1. Reduce the fuel pressure by removing the fuel pump fuse no. 19 while the engine is idling. When the engine stops, turn off the ignition and refit the fuse.


2. Remove the engine cover.

3. Disconnect the return line from the fuel rail.


4. Connect the adapter with hose, part no. 8394744, to the fuel rail return. Lead the hose to a closed receptacle.

5. Run the pump for 30 seconds using the diagnostics tool.



During 30 seconds of operation the pump should deliver at least 700 ml of fuel to the receptacle.