A6 Quattro Sedan V6-3.2L (BKH) (2005)
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Fuel Pressure Release: Service and Repair
High-Pressure Fuel Injection System, Pressure Relief
‹› The fuel injection system is separated into a high-pressure section (max. approximately 110 bar) and a low-pressure section (approximately 6 bar).
‹› Before opening the high-pressure section - e.g. removing the high-pressure pump, fuel rail, fuel injectors, the motor for intake manifold runner
control valve or any other component or fuel line that is located in the high-pressure section of the fuel injection system - the fuel pressure in the
high-pressure section must be relieved to a residual pressure of approximately 8 bar. The procedure for this is as follows.
Special tools, testers and auxiliary items required
‹› Vehicle diagnostic, testing and information system (VAS 5051) with diagnostic cable (VAS 5051/5A)
Work Procedure
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Start engine and run at idle speed.
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Connect vehicle diagnosis, testing and information system (VAS 5051) with diagnostic cable (VAS 5051/5A).
Display on (VAS 5051):
