A4 Cabriolet Mk2
Servicing injection system
Checking initial fuel pressure up to mechanical high-pressure pump
Special tools and workshop equipment required |
Test requirements:
Attention:
Fuel system is pressurised. Wrap rag around joint before opening system. Then dissipate pressure by carefully unfastening joint. Checking system pressure
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Note: This step is simply used to actuate the electric fuel pump in the fuel tank. Actuation and clicking of the fuel tank breather valve is a side-effect and can be ignored here. If final control diagnosis is to be performed twice in succession, the engine must be started between the two diagnosis procedures. The pressure gauge can remain connected.
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