Fuel Pressure Regulator: Service and Repair
REMOVAL
1. DISCONNECT CABLE FROM NEGATIVE TERMINAL OF BATTERY
CAUTION: Work must be started after approx. 20 seconds or longer from the time the ignition switch is turned to the "LOCK" position and the negative (-) terminal cable is disconnected from the battery.
Intake Air Connector Hoses:
2. REMOVE INTAKE AIR CONNECTOR
(a) Disconnect the following hoses:
(1) Air hose from IAC valve
(2) Air hose (from PS air control valve) from intake air connector
Intake Air Connector:
(b) Remove the bolt holding the intake air connector to the cylinder head cover.
(c) Loosen the two hose clamps.
(d) Disconnect the intake air connector from the throttle body and air cleaner hose, and remove the intake air connector.
Upper High-tension Cord Cover:
3. REMOVE UPPER HIGH-TENSION CORD COVER
(a) Remove the two mounting bolts.
(b) Disconnect the front side claw groove of the cord cover from the claw of the lower cover, and remove the cord cover.
Right Engine Wire Cover:
4. REMOVE RH ENGINE WIRE COVER
Remove the bolt and wire cover.
Pressure Regulator Vacuum Hose:
5. DISCONNECT VACUUM SENSING HOSE FROM FUEL PRESSURE REGULATOR
Fuel Return Line:
6. DISCONNECT FUEL RETURN PIPE FROM FUEL PRESSURE REGULATOR
Remove the union bolt and two gasket, and disconnect the return pipe from the pressure regulator.
HINT:
^ Put a suitable container or shop towel under the pressure regulator.
^ Slowly loosen the union bolt.
Pressure Regulator Lock Nut:
7. REMOVE FUEL PRESSURE REGULATOR
(a) Loosen the lock nut.
(b) Lift up the water by-pass hose between the IAC valve and throttle body, and remove the pressure regulator.
(c) Remove the O-ring from the pressure regulator.
O-ring Installation:
INSTALLATION
1. INSTALL FUEL PRESSURE REGULATOR AND FUEL RETURN PIPE
(a) Fully loosen the lock nut on the pressure regulator.
(b) Apply a light coat of gasoline to a new O-ring and install it to the pressure regulator.
(c) Lift up the water by-pass hose between the IAC valve and throttle body, and completely insert the pressure regulator into the delivery pipe by hand.
(d) Turn the pressure regulator counterclockwise until the vacuum sensing port faces in the direction indicated in the illustration.
Fuel Return Line:
(e) Connect the fuel return pipe to the pressure regulator with new two gaskets and the union bolt.
Torque: 35 N-m (360 kgf.cm, 26 ft-lbs)
Pressure Regulator Lock Nut:
(f) Tighten the lock nut.
Torque: 29 N-m (300 kgf.cm, 22 ft-lbs)
Pressure Regulator Vacuum Hose:
2. CONNECT VACUUM SENSING HOSE TO FUEL PRESSURE REGULATOR
3. INSTALL RH ENGINE WIRE COVER
(a) Fit portions A and B of the engine wire cover, matching them with the lower high-tension cord cover and No.3 timing belt cover.
(d) Install the engine wire cover with the bolt.
4. INSTALL UPPER HIGH-TENSION CORD COVER
(a) Fit portion A of the upper high-tension cover, matching it with the top of the lower high-tension cord cover.
Upper High-tension Cord Cover:
(b) Push the front side of the high-tension cord cover, and connect the front side claw groove of the upper high-tension cord cover to the claw of the lower high-tension cord cover.
(c) Install the upper high-tension cord cover with the two bolts.
5. INSTALL INTAKE AIR CONNECTOR
(a) Connect the end portions of the intake air connector to the throttle body and air cleaner hose.
(b) Tighten the two hose clamps.
(c) Install the bolt holding the intake air connector to the cylinder head cover.
(d) Connect the following hoses:
(1) Air hose to IAC valve
(2) Air hose (from PS air control valve) to intake air connector
6. CONNECT CABLE TO NEGATIVE TERMINAL OF BATTERY
7. CHECK FOR FUEL LEAKS