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.

1. Relieve the fuel pressure from the fuel system. Refer to Fuel Pressure Relief .



2. Clean the fuel rail assembly and connections.
3. Remove the fuel feed (1) and return pipes (2) from the fuel rail. Refer to Plastic Collar Quick Connect Fitting Service .



4. Remove the vacuum hose from the fuel pressure regulator.



5. Remove the vacuum hose from the throttle body.



6. Remove the ignition coil wires from the ignition coils.



7. Remove the electrical connectors from the fuel injectors.



8. Remove the fuel rail hold-down bolts.
9. Remove the fuel rail with equal force on both sides of the fuel rail.

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.

Notice: 

1. The O-rings must be replaced on all components that are replaced.
2. Lightly oil the fuel injector O-rings with clean motor oil.
3. Place the fuel rail assembly on the intake manifold.
4. Seat the fuel injectors by HAND.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

5. Install the fuel rail hold down bolts.

Tighten
Tighten the hold-down bolts to 10 N·m (7 lb ft).




6. Connect the electrical connectors to the fuel injectors.



7. Install the fuel feed (1) and return pipes (2) to the fuel rail. Refer to Plastic Collar Quick Connect Fitting Service .



8. Install the vacuum hose to the fuel pressure regulator.



9. Install the vacuum hoses to the throttle body.



10. Install the ignition coil wires to the ignition coils.



11. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .