A8L V8-4.2L (BFM) (2004)
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Fuel Pressure: Pressure, Vacuum and Temperature 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.
