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Fuel Pressure|Specifications|Page 5323 > < Secondary Air Injection (AIR) Pump Relay -J299- and Activation, Checking|Page 5318

S4 V8-4.2L (BHF) (2004)

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Fuel Pressure: Specifications

Fuel pressure at idling speed
Vacuum hose connected approx.....................................................................................................................................................................................3.5 bar
Vacuum hose disconnected approx................................................................................................................................................................................4.0 bar
After 10 minutes the remaining pressure should be at least 2.5 bar.

Fuel Pressure|Specifications|Page 5323 > < Secondary Air Injection (AIR) Pump Relay -J299- and Activation, Checking|Page 5318