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.

Important: Always maintain cleanliness when servicing fuel system components.

1. Bleed the fuel pressure from the fuel system. Refer to Fuel Pressure Relief
2. Clean the fuel rail assembly and connections.
3. Disconnect the fuel feed (1) and return (2) pipes from the fuel rail tubes by squeezing tabs and pulling the lines apart.



4. Disconnect the vacuum line from the pressure regulator.



5. Disconnect the vacuum line from the throttle body.



6. Remove the ignition coil wires.



7. Disconnect the injector electrical connectors



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. Reinstall the fuel rail hold down bolts.

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




6. Connect the fuel injector electrical connectors.



7. Reinstall the ignition coil wires.



8. Connect the vacuum line to throttle.



9. Connect the vacuum hose to pressure regulator.



10. Connect the fuel feed (1) and return (2) pipes to the fuel rail tubes
11. Tighten the fuel fill cap.
12. Reconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in engine electrical.
13. Inspect for fuel leaks.

13.1.

Turn the ignition switch ON for 2  seconds.

13.2.

Turn the ignition switch OFF for 10 seconds.

13.3.

Turn the ignition switch ON.

13.4.

Check for fuel leaks.




14. Reinstall the injector sight shield Refer to Fuel Injector Sight Shield Replacement in engine mechanical.