TT Quattro Roadster L4-1.8L Turbo (AMU) (2002)
Fuel Injector: Service and Repair
Fuel Injectors, Removing and Installing
Fuel Injectors, Removing And Installing
Removing
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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 -G163-
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Throttle valve control module -J338-
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Detach cable channel to fuel injectors.
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Disconnect fuel supply line -1- and fuel return line -2- by pressing on release buttons at separating point.
WARNING: Fuel system is under pressure! Place a cloth around connection point before opening system. Then release pressure by carefully
loosening connection point.
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Disconnect vacuum hose from fuel pressure regulator.
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Unscrew the 2 socket-head bolts (item no. 7 ) for the fuel rail.
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Remove fuel rail with injectors from intake manifold simultaneously upward and set aside in rear of engine compartment on a clean cloth.
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Disengage retaining clip and remove fuel injector.
NOTE: Fuel lines must be disconnected before replacing fuel rail.
Installing
Installation is reverse of removal, noting the following:
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Remove O-rings at all opened connections. (Never remove plastic cap from head of fuel injector, to replace front O-ring - pry O-ring off over
plastic cap).
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Always coat O-rings with clean engine oil. 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.