S4 Sedan L5-2226cc 2.22L DOHC Turbo (AAN) (1992)
Fuel Pressure: Specifications
SYSTEM PRESSURE
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Must be: 4.0-4.2 bar (58-61 psi) with fuel pump running
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Must be: 3.4-3.7 bar (49-54 psi) immediately after fuel pump (remote control) is switched OFF
Vacuum Applied To The Fuel Pressure Regulator
Observe pressure drop on fuel pressure gauge.
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Must be approximately 0.5 bar (7 psi).
RESIDUAL FUEL PRESSURE
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Wait 10 minutes
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Check residual pressure.
Minimum acceptable pressure values:
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Cold engine: 2.5 bar (36 psi)
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Warm engine: 2.8 bar (41 psi)