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Fuel Pressure|System Diagnosis > < Fuel Pressure Regulator and Residual Pressure With Return Line, Checking|Page 8250

A8 Quattro Sedan V8-4.2L (BFM) (2005)

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Fuel Pressure: Specifications

Fuel Pressure

At idle speed ..................................................................................................................................................................  Approx. 3.5 bar positive pressure
Vacuum hose disconnected from fuel pressure regulator ..............................................................................................  Approx. 4.0 bar positive pressure
Reconnect hose, turn ignition Off. After 10 minutes there must be a residual pressure of at least 2.5 bar.

Fuel Pressure|System Diagnosis > < Fuel Pressure Regulator and Residual Pressure With Return Line, Checking|Page 8250