J 34730 Fuel Pressure Gauge

Notice: Do not use compressed air to test or clean a fuel pressure regulator. Excessive air pressure can damage the fuel pressure regulator.

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



2. Disconnect the fuel pressure regulator vacuum hose from the fuel pressure regulator.



3. Clean any dirt from the fuel pressure regulator (6) retaining ring (3).
4. Remove the retaining ring (3).
5. Catch any spilled fuel using a shop towel.
6. Lift and twist the fuel pressure regulator (6) from the fuel rail socket.
7. Cover the fuel pressure regulator housing to prevent contamination from entering the fuel system.
8. Clean the fuel pressure regulator filter screen (1) with gasoline and a soft brush.

Important: When servicing the fuel pressure regulator, insure that the O-ring backup, large O-ring, filter screen, and small O-ring are properly placed on the regulator.

1. Install new O-rings on the fuel pressure regulator, if a new fuel pressure regulator is not being installed.

1.1.	Install the regulator seal O-ring (2) (small O-ring).

1.2.	Install the regulator filter (1).

1.3.	Install the regulator seal O-ring (4) (large O-ring)

1.4.	Install the O-ring back-up (5).

2. Insert the regulator into the fuel rail socket using a turning motion to properly seat the O-rings.
3. Install the retaining ring (3) on the fuel pressure regulator (6).
4. Position the vacuum port on the fuel pressure regulator in the original position.



5. Connect the vacuum hose to the fuel pressure regulator.



6. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
7. Turn the ignition switch ON for 2 seconds.
8. Turn the ignition switch OFF for 10 seconds.
9. Turn the ignition switch ON.
10. Check for fuel leaks.
11. Install the rear seat cushion. Refer to Rear Seat Cushion Replacement in Seats.
12. Install the intake manifold sight shield.

Tighten
Tighten the nuts to 3 N·m (27 lb in).