Fuel Pressure Regulator Replacement Central SFI

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

1. Disconnect the negative battery cable.
2. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure .
3. Remove the upper manifold assembly. Refer to Engine Mechanical.

Important: If the fuel pressure regulator is to be reinstalled, inspect the filter screen (if equipped) for contamination. If the filter screen is contaminated, remove and discard.

1. Disassemble the fuel pressure regulator snap ring retainer.



2. Disassemble the regulator assembly and the O-rings.
3. Discard the O-rings.

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

1. Lubricate the new O-rings with clean engine oil.
2. Install the backup O-ring, the large O-ring, the filter and the small O-ring.



3. Assemble the regulator with the vacuum tube pointing down into the snap ring retainer.

1. Install the upper manifold assembly. Refer to Engine Mechanical.
2. Connect the negative battery cable.

Fuel Pressure Regulator Replacement SFI

1. Disconnect the negative battery cable.
2. Relieve the fuel system pressure. Refer to the Fuel Pressure Relief Procedure .
3. Remove the ignition coil.
4. Remove the intake manifold plenum. Refer to Engine Mechanical.
5. Disconnect the vacuum line to the regulator.
6. Remove the snap ring (1) from the pressure regulator housing.
7. Place a towel under regulator to catch any fuel, then remove pressure regulator from fuel socket. Twist back and forth while pulling from the socket.
8. Remove the fuel pressure regulator (2) from the fuel rail socket.
9. Remove the pressure regulator small O-ring (6), filter (5), large O-ring (4), O-ring backup (3), and discard.

1. Lubricate the new pressure regulator O-rings (3), (4), (5), (6) with clean engine oil and install on the regulator inlet as a complete assembly.
2. Install the snap ring retainer (1) into the slot on the fuel regulator housing.
3. Connect the vacuum line to the regulator.

Important: 

•	Verify that retainer is engaged in slot in pressure regulator housing. Grasp and pull on regulator (2) to ensure that it is properly seated.

•	Turn ignition to ON for two seconds and then turn OFF for 10 seconds. Once again turn the ignition to ON and check for fuel leaks.

4. Install the intake manifold plenum. Refer to Engine Mechanical.