A4 Quattro Wagon L4-2.0L Turbo (BPG) (2005)
Fuel Rail: Service and Repair
Fuel Rail, Assembly Overview
Fuel Rail, Assembly Overview
1
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Radial adjustment
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Replace if damaged
2
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Fuel injector
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With combustion chamber seal (Teflon seal), always replace
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Replace O-Rings
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Note correct installation position
3
-
Support ring
4
-
Fuel rail
5
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Fuel Pressure Sensor G247
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22 Nm
-
Tighten connections to 30 Nm
6
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Low Fuel Pressure Sensor G410
-
15 Nm
7
-
Fuel Pressure Regulator Valve N276
8
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Mechanical single-piston high-pressure pump
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With Fuel Pressure Regulator Valve N276 and Low Fuel Pressure Sensor G410
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An electrical fuel pump, located in the fuel tank, supplies fuel to the mechanical high-pressure pump at a pressure of approx. 6 bar.
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When installing the high-pressure pump, make sure that no dirt enters the fuel system.
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The fuel system must be pressureless to install the high-pressure pump, release the fuel pressure.
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Do not install fuel lines with tension
9
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Evaporative Emission (EVAP) Canister Purge Regulator Valve N80
10
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Throttle Valve Control Module J338, Throttle Drive (for Electronic Power Control (EPC)) G186
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With Throttle Drive Angle Sensor 1 (for Electronic Power Control (EPC)) G187 and Throttle Drive Angle Sensor 2 (for Electronic Power
Control (EPC)) G188
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After replacing the Throttle Valve Control Module J338, it must be adapted to the Engine Control Module (ECM) J623 again (basic
setting, display group 60) see "Guided Fault Finding"
11
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Intake Air Temperature (IAT) Sensor 2 G299
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Tighten to 5 Nm