Removal Procedure
An eight digit identification number is stamped on the left hand fuel rail (fueling even cylinders 2, 4, 6). Refer to this number if servicing or part replacement is required.
CAUTION:
In order to reduce the risk of fire and personal injury that may result from a fuel leak, always install the fuel injector O-rings in the proper position. If the upper and lower O-rings are different colors (black and brown), be sure to install the black O-ring in the upper position and the brown O-ring in the lower position on the fuel injector. The O-rings are the same size but are made of different materials.
IMPORTANT:
When servicing the fuel rail assembly, precautions must be taken to prevent dirt and other contaminants from entering the fuel passages. It is recommended that the fittings be capped, and the holes be plugged during servicing.
- Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure .
- Remove the upper intake manifold. Refer to Intake Manifold Replacement - Upper in Engine Mechanical.
- Disconnect the engine fuel feed pipe at the fuel rail.
- Disconnect the engine fuel return pipe at the fuel pressure regulator.
- Remove the fuel feed pipe and fuel return pipe O-rings and discard.
- Disconnect the main injector harness electrical connector.
- Disconnect the connectors from the fuel injectors using the procedures in steps 8 and 9.
- Pull up the lock release of the fuel injector connector (2).
- Depress the lock tab (1) and lift the connector from the injector.
- Remove the injector electrical harness from the fuel rail.
- Disconnect the coolant temperature sensor electrical connector.
- Remove the fuel rail retaining bolts.
- Remove the fuel rail assembly.
- Remove the injector O-ring seal from the spray tip end of each injector.