S6 V8-4.2L (BBD) (2004)
Fuel Pressure: Testing and Inspection
Fuel Pressure Regulator And Residual Pressure, Checking
Recommended special tools and equipment
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Fuel Inj. Pressure Gauge Set V.A.G 1318 with adapters V.A.G 1318/6 and V.A.G 1318/7
Test requirements:
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Fuel Pump (FP) Relay OK. See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Fuel Pump Relay/Testing and
Inspection/With Generic Scan Tool
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Delivery quantity of Fuel Pump (FP) OK. See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Testing and Inspection/Fuel
Supply/Fuel Pump (FP), Checking Delivery Quantity
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Fuel filter OK
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Parking brake engaged.
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Vehicles with automatic transmission: Selector lever in P or N.
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Electrical consumers switched off (radiator fan must NOT run during test).
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A/C switched off.
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Ignition switched off.
Work procedure
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Remove engine cover (arrows).
Checking system pressure
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Open fuel filler flap briefly (pressure release).
CAUTION: Fuel system is under pressure! Before opening system, place rags around the connection area. Then release pressure by carefully loosening
connection.