A4 Quattro Sedan L4-1.8L Turbo (AWM) (2001)
Fuel Injector: Service and Repair
Fuel Injectors, Removing and Installing
Fuel Injectors, Removing And Installing
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Remove engine cover (arrows).
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Disconnect wiring/connectors at:
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Fuel injectors -N30-, -N31-, -N32-, -N33-
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Intake Air Temperature (IAT) sensor -G42-
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Camshaft Position (CMP) sensor 2 -G40-
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Throttle valve control module -J338-
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Remove retaining bolts for fuel supply rail and disconnect vacuum line at fuel pressure regulator (arrows).
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Disconnect fuel distributor with injectors from intake plenum and set aside in rear of engine compartment on a clean cloth.
WARNING!
Fuel system is under pressure! Before opening system, place rags around the connection point. Then release pressure by carefully loosening
connection.
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Disengage retaining clip and remove fuel injector.
NOTE: Fuel lines must be removed before replacing fuel distributor.
Installation is reverse of removal, noting the following:
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Remove O-rings at all opened connections. (Never remove plastic cap from valve head to replace front O-ring - pry O-ring off over plastic cap).
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Lightly lubricate O-rings with clean engine oil.
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Make sure fuel injectors are in place and seated correctly
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Check clip for unobstructed fitting.
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Place fuel rail with secured fuel injectors onto intake manifold, and apply uniform pressure to press it in.