1986 TOYOTA SUPRA Service Repair Manual

(g) Reconnect the negative (±) terminal cable to the battery.
(h) Turn the ignition switch ON.
(i) Measure the fuel pressure.
Fuel pressure:
226±275 kPa (2.3±2.8 kgf/cm
2, 33±40 psi)
If pressure is high, replace the fuel pressure regulator.
If pressure is low, check the following parts:
wFuel hoses and connections
wFuel pump
wFuel filter
wFuel pressure regulator
(j) Remove the SST from the DLC1.
SST 09843±18020
(k) Start the engine.
(l) Disconnect the vacuum sensing hose from the fuel pressure
regulator, and plug the hose end.
(m) Measure the fuel pressure at idle.
Fuel pressure:
226±275 kPa (2.3±2.8 kgf/cm
2, 33±40 psi)
(n) Reconnect the vacuum sensing hose to the fuel pressure
regulator.
(o) Measure the fuel pressure at idle.
Fuel pressure:
167±216 kPa (1.7±2.2 kgf/cm
2, 24±31 psi)
If pressure is not as specified, check the vacuum sensing
hose and fuel pressure regulator.
(p) Stop the engine.
(q) Check that the fuel pressure remains as specified for 5
minutes after the engine has stopped.
Fuel pressure:
147 kPa (1.5 kgf/cm
2, 21 psi) or more
If pressure is not as specified, check the fuel pump, pressure
regulator and/or injectors.
(r) After checking fuel pressure, disconnect the negative (±)
terminal cable from the battery and carefully remove the SST
to prevent gasoline from splashing.
SST 09268±45012
(s) Reinstall the fuel inlet hose to the fuel filter with 2 new gaskets
and the union bolt.
Torque: 29 NVm (300 kgfVcm, 22 ftVlbf)
(t) Reconnect the negative (±) terminal cable to the battery.
(u) Check for fuel leaks.
(See item 5 in fuel system in precaution)
± ENGINESFI SYSTEM (2JZ±GTE)EG±265

COMPONENTS FOR REMOVAL AND
INSTALLATION
FUEL PUMP REMOVAL
CAUTION: Do not smoke or work near an open flame when
working on the fuel pump.
1. TAKE OUT FLOOR CARPET
2. REMOVE SPARE WHEEL COVER
3. REMOVE SPARE WHEEL
4. REMOVE SERVICE HOLE COVER EG±266
± ENGINESFI SYSTEM (2JZ±GTE)

5. REMOVE FUEL PUMP AND SENDER GAUGE ASSEMBLY
(a) Disconnect the connector and hoses from the fuel pump
bracket:
(1) Fuel pump connector
(2) Fuel outlet hose
Remove the union bolt and 2 gaskets, and disconnect
the outlet hose.
(3) Fuel return hose
(4) Fuel breather hose
(b) Remove the retainer clamp.
(c) Using SST, loosen the retainer.
SST 09808±14010
(d) Remove the retainer, and disconnect the fuel pump and
sender gauge assembly from the fuel tank.
(e) Disconnect the fuel return hose from the return port of the fuel
pump bracket.
(f) Remove the fuel pump, sender gauge assembly and gasket.
FUEL PUMP INSPECTION
1. INSPECT FUEL PUMP RESISTANCE
Using an ohmmeter, measure the resistance between termi-
nals 4 and 5.
Resistance:
0.1±3.0
at 20°C (68°F)
If the resistance is not as specified, replace the fuel pump,
lead wire or fuel pump bracket.
2. INSPECT FUEL PUMP OPERATION
Connect a tester lead from terminal 4 of the connector to the
positive (+) terminal of the battery; connect another tester
lead from terminal 5 of the connector to the negative (±) termi-
nal of the battery.
NOTICE:
wThese tests must be performed quickly (within 10 se-
conds) to prevent the coil from burning out.
± ENGINESFI SYSTEM (2JZ±GTE)EG±267

wKeep the fuel pump as far away from the battery as pos-
sible.
wAlways connect or disconnect at the battery.
If operation is not as specified, replace the fuel pump, lead
wire or fuel pump bracket.
COMPONENTS FOR DISASSEMBLY AND
ASSEMBLY
FUEL PUMP DISASSEMBLY
Assembly is in the reverse order of disassembly.
1. REMOVE FUEL SENDER GAUGE FROM FUEL PUMP
BRACKET
(a) Disconnect the connector from the fuel pump bracket.
(b) Remove the 2 screws and sender gauge. EG±268
± ENGINESFI SYSTEM (2JZ±GTE)

2. REMOVE FUEL PUMP FROM PUMP BRACKET
(a) Remove the 2 nuts and spring washers, and disconnect the
lead wire from the fuel pump.
(b) Disconnect the connector from the fuel pump bracket, and
remove the lead wire.
(c) Pull out the lower side of the fuel pump from the pump
bracket.
(d) Remove the rubber cushion from the fuel pump.
(e) Disconnect the fuel hose from the fuel pump, and remove the
fuel pump.
3. REMOVE FUEL PUMP FILTER FROM FUEL PUMP
(a) Using a small screwdriver, remove the clip.
INSTALLATION HINT: Use a new clip.
(b) Pull out the pump filter.
FUEL PUMP INSTALLATION
1. INSTALL FUEL PUMP AND SENDER GAUGE ASSEMBLY
(a) Install a new gasket to the fuel tank.
(b) Insert fuel pump and sender gauge assembly into the fuel
tank.
(c) Connect the fuel return hose to the return port of the fuel
pump bracket.
(d) Align the arrow marks of the fuel pump bracket and fuel tank.
± ENGINESFI SYSTEM (2JZ±GTE)EG±269

(e) Temporarily install the retainer.
(f) Using SST, tighten the retainer until the arrow mark on
retainer is within the lines on the fuel tank.
SST 09808±14010
(g) Check that the arrow marks of the fuel pump bracket and fuel
tank are aligned.
(h) Install the retainer clamp.
(i) Connect the connector and hoses to the fuel pump bracket:
wFuel pump connector
wFuel outlet hose
Connect the outlet hose with 2 new gaskets and the union
bolt.
Torque: 29 NVm (300 kgfVcm, 22 ftVlbf)
wFuel return hose
wFuel breather hose
2. INSTALL SERVICE HOLE COVER
3. INSTALL SPARE WHEEL
4. INSTALL SPARE WHEEL COVER
5. INSTALL FLOOR CARPET
6. CHECK FOR FUEL LEAKS
(See item 5 in fuel system in precaution) EG±270
± ENGINESFI SYSTEM (2JZ±GTE)

FUEL PRESSURE REGULATOR
COMPONENTS FOR REMOVAL AND
INSTALLATION
FUEL PRESSURE REGULATOR
REMOVAL
1. REMOVE THROTTLE BODY
(See throttle body removal)
2. DISCONNECT VACUUM SENSING HOSE FROM FUEL
PRESSURE REGULATOR
3. DISCONNECT FUEL RETURN PIPE FROM FUEL
PRESSURE REGULATOR
Remove the union bolt and 2 gaskets, and disconnect the re-
turn pipe from the pressure regulator.
CAUTION:
wPut a shop rag under the pressure regulator.
wSlowly loosen the union bolt.
4. REMOVE FUEL PRESSURE REGULATOR
(a) Remove the 2 bolts, and pull out the pressure regulator.
(b) Remove the O±ring from the pressure regulator.
± ENGINESFI SYSTEM (2JZ±GTE)EG±271

FUEL PRESSURE REGULATOR
INSTALLATION
1. INSTALL FUEL PRESSURE REGULATOR
(a) Apply a light coat of gasoline to a new O±ring, and install it
to the pressure regulator.
(b) Attach the pressure regulator to the delivery pipe.
(c) Check that the pressure regulator rotates smoothly.
NOTICE: If it does not rotate smoothly, the O±ring may be
pinched, so remove the pressure regulator and do steps (b)
and (c) above again.
(d) Install the pressure regulator with the 2 bolts.
Torque: 8.8 NVm (90 kgfVcm, 78 in.Vlbf)
2. CONNECT FUEL RETURN PIPE TO FUEL PRESSURE
REGULATOR
Install the return pipe with 2 new gaskets and the union bolt.
Torque: 27 NVm (280 kgfVcm, 20 ftVlbf)
3. CONNECT VACUUM SENSING HOSE TO FUEL
PRESSURE REGULATOR
4. INSTALL THROTTLE BODY
(See throttle body installation)
5. CHECK FOR FUEL LEAKS
(See item 5 in fuel system in precaution) EG±272
± ENGINESFI SYSTEM (2JZ±GTE)