TOYOTA SUPRA 1995 Service Repair Manual

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. CHECK FOR FUEL LEAKS
(See item 5 in fuel system in precaution)
± ENGINESFI SYSTEM (2JZ±GE)EG±201

INJECTOR
ON±VEHICLE INSPECTION
1. INSPECT INJECTOR OPERATION
Check operation sound from each injector.
(a) With the engine running or cranking, use a sound scope to
check that there is normal operating noise in proportion to
engine speed.
(b) If you have no sound scope, you can check the injector
transmission operation with your finger.
If no sound is heard or unusual vibration is felt, check the wir-
ing connector, injector or injection signal from the ECM.
2. INSPECT INJECTOR RESISTANCE
(a) Re mo ve th e th ro ttle bo d y together with the intake air
connector. (See steps 1 to 9 in injector removal)
(b) Disconnect the 6 injector connectors.
(c) Using an ohmmeter, measure the resistance between the
injector terminals.
Resistance:
At 205C (685F) 13.4±14.2

If the resistance is not as specified, replace the injector.
(d) Reconnect the 6 injector connectors.
(e) Reinstall the throttle body together with the intake air
connector. (See steps 8 to 16 in injector installation) EG±202
± ENGINESFI SYSTEM (2JZ±GE)

COMPONENTS FOR REMOVAL AND
INSTALLATION
± ENGINESFI SYSTEM (2JZ±GE)EG±203

INJECTORS REMOVAL
1. DRAIN ENGINE COOLANT
2. DISCONNECT CONTROL CABLES FROM THROTTLE
BODY
3. REMOVE INTAKE AIR CONNECTOR PIPE
(a) Disconnect these hoses:
(1) PS air hose from air connector pipe
(2) PCV hose from No.2 cylinder head cover
(b) Loosen the 2 hose clamps, and remove the air connector
pipe together with the hoses.
4. California only:
REMOVE VSV FOR FUEL PRESSURE CONTROL
(a) Disconnect the connector and hoses:
(1) VSV connector
(2) Vacuum sensing hose from fuel pressure control
(3) Vacuum sensing hose from air intake chamber
(b) Remove the bolt and VSV.
5. REMOVE EGR PIPE
(a) Loosen the union nut of the EGR pipe.
(b) Remove the 2 bolts, EGR pipe and gasket.
6. DISCONNECT EGR GAS TEMPERATURE SENSOR
CONNECTOR
(a) Disconnect the connector from the No.2 vacuum pipe.
(b) Disconnect the sensor connector from the wiring connector.
7. DISCONNECT NO.2 VACUUM PIPE FROM AIR INTAKE
CHAMBER AND INTAKE MANIFOLD
Remove the 2 nuts, and disconnect the vacuum pipe from the
air intake chamber and intake manifold.
8. DISCONNECT THROTTLE BODY BRACKET FROM
THROTTLE BODY AND CYLINDER HEAD
Remove the 4 nuts, and disconnect the throttle body bracket
from the throttle body and cylinder head. EG±204
± ENGINESFI SYSTEM (2JZ±GE)

9. REMOVE THROTTLE BODY AND INTAKE AIR
CONNECTOR ASSEMBLY
(a) Disconnect these connectors and hoses:
(1) Throttle position sensor connector
(2) IAC valve connector
(3) VSV connector for EGR
(4) PCV hose from intake air connector
(5) Water bypass hose (from No.2 water bypass pipe) from
throttle body
(6) California only:
Air hose from IAC valve
(b) Remove the nut holding the VSV for the ACIS to the air intake
chamber.
(c) Remove the 4 bolts and 2 nuts holding the intake air
connector to the air intake chamber.
(d) Disconnect these hoses, and remove the throttle body, intake
air connector assembly and gasket.
(1) 3 vacuum hoses (from No.2 vacuum pipe) from No.1
vacuum pipe
(2) Water bypass hose (from water outlet) from throttle body
(3) Vacuum hose (from actuator for ACIS) from No.1 vacu-
um pipe
10. REMOVE AIR INTAKE CHAMBER STAYS
(a) Remove the bolt, nut and No.1 stay.
(b) Remove the bolt, nut and No.2 stay.
11. Except California:
DISCONNECT VACUUM SENSING HOSE FROM FUEL
PRESSURE REGULATOR
12. DISCONNECT FUEL INLET PIPE FROM DELIVERY PIPE
Remove the union bolt and 2 gaskets, and disconnect the in-
let pipe from the delivery pipe.
CAUTION:
 Put a shop towel under the delivery pipe.
± ENGINESFI SYSTEM (2JZ±GE)EG±205

Slowly loosen the union bolt.
13. D I S C O N N E C T F U E L R E T U R N P I P E F R O M F U E L
PRESSURE REGULATOR
Remove the union bolt and 2 gaskets, and disconnect the
fuel pipe from the pressure regulator.
CAUTION:
Put a shop towel under the pressure regulator.
Slowly loosen the union bolt.
14. DISCONNECT INJECTOR CONNECTORS
Disconnect the 6 injector connectors.
15. DISCONNECT ACTUATOR FOR ACIS FROM AIR INTAKE
CHAMBER
(a) Remove the 2 bolts, and disconnect the actuator from the air
intake chamber.
(b) Wrap the actuator with adhesive tape and attach it to the
intake chamber.
NOTICE: Do not apply any force on the actuator rod and pre-
vent the rod clip from detaching.
16. REMOVE DELIVERY PIPE AND INJECTORS
(a) Remove the 3 bolts and delivery pipe together with the 6
injectors.
NOTICE: Be careful not to drop the injectors when removing
the delivery pipe.
(b) Remove the 6 insulators (Except California) and 3 spacers
from the intake manifold. EG±206
± ENGINESFI SYSTEM (2JZ±GE)

(c) Pull out the 6 injectors from the delivery pipe.
(d) California:
Remove the 2 O±rings, insulator and grommet from each in-
jector.
(e) Except California:
Remove the O±ring and grommet from each injector.
INJECTORS INSPECTION
1. INSPECT INJECTOR INJECTION
CAUTION: Keep injector clear of sparks during the test.
(a) Remove the union bolt and 2 gaskets, and disconnect the
fuel inlet hose from the fuel filter outlet.
± ENGINESFI SYSTEM (2JZ±GE)EG±207

(b) Connect SST (hose) to the fuel filter outlet with SST (union),
the 2 gaskets and union bolt.
SST 09268±41045 (90405±09015)
Torque: 29 NVm (300 kgfVcm, 22 ftVlbf)
(c) Disconnect the fuel return hose from the fuel return pipe.
(d) Remove the fuel pressure regulator from the delivery pipe.
(See step 3 in fuel pressure regulator removal)
(e) Install the O±ring to the fuel inlet of the pressure regulator.
(f) Connect SST (hose) to the fuel inlet of the pressure regulator
with SST (union) and the 2 bolts.
SST 09268±41045 (09268±41090)
(g) Connect the fuel return hose to the fuel outlet of the pressure
regulator with SST (union), the 2 gaskets and union bolt.
SST 09268±41045 (09268±41070)
(h) Install the grommet and O±ring to the injector.
(i) Connect SST (hose) to the injector with SST (union), and
hold the injector and union with SST (clamp).
SST 09268±41045
(j) Put the injector into the graduated cylinder.
HINT: Install a suitable vinyl hose onto the injector to prevent
gasoline from splashing out. EG±208
± ENGINESFI SYSTEM (2JZ±GE)

(k) Using SST, connect terminals +B and FP of the DLC 1.
SST 09843±18020
(l) Reconnect the negative (±) terminal cable to the battery.
(m) Turn the ignition switch ON.
NOTICE: Do not start the engine.
(n) Connect SST (wire) to the injector and battery for 15
seconds, and measure the injection volume with a graduated
cylinder. Test each injector 2 or 3 times.
SST 09842±30070
Injection volume:
70±88 cm
3 (4.3±5.4 cu in.) per 15 sec.
Difference between each injector:
9 cm
3 (0.5 cu in.) or less
If the injection volume is not as specified, replace the injector.
2. INSPECT LEAKAGE
(a) In the condition above, disconnect the tester probes of SST
(wire) from the battery and check the fuel leakage from the
injector.
SST 09842±30070
Fuel drop:
One drop or less per minute
(b) Disconnect the negative (±) terminal cable from the battery.
(c) Remove the SST.
SST 09268±41045 and 09843±18020
(d) Reconnect the fuel inlet hose to the fuel filter with 2 new
gaskets and union bolt.
Torque: 29 NVm (300 kgfVcm, 22 ftVlbf)
(e) Reconnect the fuel return hose to the fuel return pipe.
(f) Reinstall the fuel pressure regulator to the delivery pipe. (See
step 1 in fuel pressure regulator installation)
± ENGINESFI SYSTEM (2JZ±GE)EG±209

INJECTORS INSTALLATION
1. INSTALL INJECTORS AND DELIVERY PIPE
(a) California:
Install new insulator and grommet to each injector.
(b) Except California:
Install a new grommet to each injector.
(c) California:
Apply a light coat of gasoline to 2 new O±rings, and install
them to each injector.
(d) Except California:
Apply a light coat of gasoline to a new O±ring, and install it
to each injector.
(e) While turning the injector clockwise and counterclockwise,
push it to the delivery pipe. Install the 6 injectors.
(f) Position the injector connector outward.
(g) Install these parts to the intake manifold:
(1) 3 spacers
(2) Except California:
6 new insulators
(h) Install the 3 bolts to the delivery pipe.
(i) California:
Apply a light coat of gasoline to O±ring on each injector.
(j) Attach the 6 injectors together with the delivery pipe to the
intake manifold. EG±210
± ENGINESFI SYSTEM (2JZ±GE)