Fuel Rail: Service and Repair

REMOVAL PROCEDURE

Tools Required

J 34730 Fuel Pressure Gauge

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 Release Procedure.

Description:

2. Clean the fuel rail assembly and connections.




3. Remove the fuel feed (2) and return (1) pipes from the fuel rail. Refer to Fuel Line Coupler / Service and Repair.

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




5. Remove the vacuum line from the throttle body.

Description:

6. Remove the ignition coil wires.




7. Remove the fuel injector electrical connectors.




8. Remove the fuel rail hold-down bolts.

Fuel Rail:

9. Remove the fuel rail with equal force on both sides of the fuel rail.

INSTALLATION PROCEDURE

CAUTION: In order to reduce the fire of fire and personal Injury that may result from a fuel leak, always Ins tall 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:

^ Use care when servicing the fuel system components, especially the fuel injector electrical connectors, the fuel injector tips, the injector O-rings. Plug the inlet and the outlet ports of the fuel rail in order to prevent contamination.

^ Do not use the compressed to clean the fuel rail assembly as this may damage the fuel rail components.

^ Do not immerse the fuel rail assembly in a solvent bath in order to prevent damage to the fuel rail assembly.

1. The O-rings must be replaced on all components that are replaced.

2. Lightly oil the fuel injector (4) O-rings with clean motor oil.

3. Place the fuel rail assembly on the intake manifold.

4. Seat the fuel injectors by HAND.

5. Install the fuel rail hold down bolts.
^ Tighten the fuel rail hold-down bolts to 10 Nm (7 ft. lbs.).

NOTICE: Refer to Service Precautions / Fasteners.

6. Install the fuel injector electrical connectors to the fuel injectors.

7. Install the fuel feed (2) and return (1) pipes to the fuel rail. Refer to Fuel Line Coupler, Service and Repair, Quick Connect Fitting(s) Service (Plastic Collar).

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

9. Install the vacuum line to throttle body.

10. Install the ignition coil wires.




11. Install the fuel injector sight shield. Refer to Engine Cover Replacement Service and Repair.