A4 Quattro Cabriolet V6-3.2L (BKH) (2007)
Fuel Pressure Release: Service and Repair
Before Opening High Pressure Fuel Injection System
‹› 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 - for example 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 5051B) with Diagnostic Cable (VAS 5051/5A )
Procedure
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Start engine and run at idle speed.
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Connect (VAS 5051B) with (VAS 5051/5A ).