Audi Workshop Service and Repair Manuals

Fuel Pressure: Specifications
Pressure

SYSTEM OPERATING PRESSURE [1] 

Vacuum hose connected .............................................................................................................................................................  3.2 - 3.8 bar (46 - 55 psi)
Vacuum hose disconnected ........................................................................................................................................................  3.8 - 4.2 bar (55 - 61 psi)

SYSTEM RESIDUAL PRESSURE [2] 

Cold engine ................................................................................................................................................................................................  2.2 bar (32 psi)
Warm engine ...........................................................................................................................................................................................  3.0 bar (43.5 psi)

[1]:  At idle.
[2]:  After 10 minutes.