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Pressure|Page 1648 > < Engine - Rattle/Knock On Cold Start-Up (Normal)|Page 1642

A8 Sedan V8-3.7L (AEW) (1997)

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Fuel Pressure: Specifications
Pressure

At idle. .............................................................................................................................................................................................  approx. 3.6 bar (52 psi)

Disconnect vacuum hose (arrow) for fuel pressure regulator.

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Fuel pressure must increase to ..............................................................................................................................................  approx. 4.2 bar (61 psi).

Residual pressure after 10 minutes ................................................................................................................................................  At least 3 bar (44 psi).

Pressure|Page 1648 > < Engine - Rattle/Knock On Cold Start-Up (Normal)|Page 1642