Fuel Pressure Regulator: Service and Repair

Upper And Lower Manifold Assemblies:

Upper And Lower Manifold Assembly-Part Name:

REMOVE OR DISCONNECT
1. Relieve fuel system pressure.

- Refer to the Fuel Pressure Relief Procedure. Service and Repair

2. Disconnect negative battery cable.
3. Remove vacuum hose from regulator.
4. Fuel return pipe clamp.
5. Fuel return pipe and O-ring from regulator.

- Discard O-ring.

6. Pressure regulator bracket attaching screw.
7. Pressure regulator assembly and O-ring.

- Discard O-ring.

Inspect

- If fuel pressure regulator is to be reinstalled, inspect filter screen (if equipped) for contamination. If contaminated replace filter screen.

INSTALL OR CONNECT
1. Lubricate new pressure regulator O-ring with clean engine oil, then install on pressure regulator.
2. Pressure regulator assembly onto manifold.
3. Pressure regulator bracket attaching screw coated with appropriate thread-locking material.

Thread-Locking Material.
The hardware used to attach the lower manifold pressure regulator are coated with thread-locking adhesive. If any these parts are removed for service, inspect the attaching screw threads. There should be enough thread-locking material (adhesive or compound) on the threads to insure proper relocking. If not, clean the threads and apply Loctite 262, or equivalent, to the threads before reassembly. Replacement screws are included in the service screw assortment package. New attaching hardware is included in the service packages.

- Pressure regulator bracket attaching screw to 3.5 Nm (31 lb. in.).

4. Vacuum hose to regulator.
5. Lubricate new fuel return pipe O-ring with clean engine oil, then install on end of pipe.
6. Fuel return pipe to pressure regulator.

Tighten

- Fuel return pipe attaching nut 30 Nm (22 lb. in.).

7. Fuel return pipe clamp attaching nut to lower manifold assembly.
8. Tighten fuel filler cap.
9. Negative battery terminal

- Turn ignition switch to the "0N" position for two seconds, then turn to the "OFF," position for ten seconds. Again turn to the "ON" position and check for fuel leaks.