Fuel Pressure Regulator: Service and Repair

REMOVAL


1. Depressurize the fuel system.
Refer to MAINTENANCE PROCEDURES/FUEL SYSTEM PRESSURE RELIEF.
2. Remove vacuum line at pressure regulator.
3. Disconnect the fuel return line from the fuel pressure regulator.
4. Remove the retaining screws from the pressure regulator.
5. Remove pressure regulator assembly, gasket, and O-ring.
6. If scraping is necessary, be careful not to damage fuel pressure regulator or fuel supply line gasket surfaces.


INSTALLATION

1. Lubricate new fuel pressure regulator O-ring with a light oil.
NOTE: Never use silicone grease. It will clog the injectors.
2. Verify gasket surfaces of fuel pressure regulator and fuel injection manifold are clean.
3. Install new O-ring and new gasket on regulator.
4. Position the regulator onto the fuel rail and install the retaining bolts. Torque the retaining screws to 27-40 lb. in. (3.0-4.5 N-m).
5. Reconnect the fuel return hose to the pressure regulator, then secure with clamp.
6. Reconnect the vacuum line to the pressure regulator.
7. Reconnect the electrical connector to the fuel pump.
8. START and RUN the engine. Verify the fuel system does not leak.