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There are three "Golden Rules" to adhere to when diagnosing concerns on the
N54 engine:
1. When diagnosing cases of smoke from the exhaust, it is important to avoid
unnecessary replacement of
the turbochargers. Smoke can be caused by oil consumption such as the crankcase
ventilation system.
Alwa
GENERAL FUNCTION DESCRIPTION FOR FUEL SUPPLY SYSTEMS
Fuel supply systems, spark-ignition engines
Fuel system
The electric fuel pump in the fuel tank generates the pressure in the fuel
system which is set by the pressure
regulator to a specific level.
Tank venting system
The tank venting system is a