Lexus SC300 / Lexus SC400. Service manual - part 511

INSTALLATION OF FUEL PUMP

(See Components on page 

FI–20

)

1. 

INSTALL FUEL PUMP
(a)  Install a new gasket to the pump set plate.
(b)  Connect the fuel hose to the fuel pump bracket, and

install the fuel pump and bracket assembly with the
three nuts.

Torque: 5.4 N

⋅

m (55 kgf

⋅

cm, 48 in.

⋅

lbf)

(b)  Install the fuel pump set plate with the eight bolts.

Torque: 3.9 N

⋅

m (40 kgf

⋅

cm, 35 in.

⋅

lbf)

2. INSTALL 

PARTITION 

COVER

Install the partition cover with butyl tape.

3. 

INSTALL SEAT BACK AND CUSHION

4. 

CONNECT FUEL PUMP CONNECTOR

5. 

INSTALL LUGGAGE COMPARTMENT TRIM COVER

6. 

INSTALL SPARE TIRE

7. 

INSTALL LUGGAGE COMPARTMENT FLOOR MAT

8.  CONNECT CABLE TO NEGATIVE TERMINAL OF

BATTERY

9. 

START ENGINE, AND CHECK FOR FUEL LEAKS

FI–24

EFI SYSTEM   –   Fuel System (Fuel Pump)

Fuel Pressure Regulator

ON–VEHICLE INSPECTION

CHECK FUEL PRESSURE (See page 

FI–17

)

COMPONENTS FOR REMOVAL AND
INSTALLATION

REMOVAL OF FUEL PRESSURE
REGULATOR

1.  DISCONNECT VACUUM SENSING HOSE FROM FUEL

PRESSURE REGULATOR

2. 

DISCONNECT NO. 2 FUEL PIPE FROM FUEL PRESSURE
REGULATOR
Remove the union bolt and two gasket, and disconnect the
fuel pipe from the pressure regulator.
HINT:

•

Put a suitable container or shop towel under the
pressure regulator.

•

Slowly loosen the union bolt.

3. 

REMOVE FUEL PRESSURE REGULATOR
(a)  Remove the two bolts and pressure regulator.
(b)  Remove the O–ring from the pressure regulator.

FI–24

–

EFI SYSTEM

Fuel System (Fuel Pressure Regulator)

INSTALLATION OF FUEL PRESSURE
REGULATOR

(See components on page 

FI–24

)

1.  INSTALL FUEL PRESSURE REGULATOR AND FUEL

RETURN PIPE
(a) Apply 

a 

light coat of gasoline to a new O–ring, and install

it to the pressure regulator.

(b)  Install the pressure regulator with the two bolts.

Torque:     8.8 N

⋅

m (90 kgf

⋅

cm, 78 in.

⋅

lbf)

2.  CONNECT NO. 2 FUEL PIPE TO FUEL PRESSURE

REGULATOR
Connect the fuel pipe to the pressure regulator with new two
gaskets and the union bolt.

Torque:     27 N

⋅

m (280 kgf

⋅

cm, 20 ft

⋅

lbf)

3.  CONNECT VACUUM SENSING HOSE TO FUEL

PRESSURE REGULATOR

4. 

CHECK FOR FUEL LEAKS (See page 

FI–15

)

–

EFI SYSTEM

Fuel System (Fuel Pressure Regulator)

FI–25

Cold Start Injector

FI–25

                          –   Fuel System (Cold Start Injector)

EFI SYSTEM