TOYOTA SUPRA 1986 Service Repair Manual

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)

(k) Temporarily install the 3 bolts holding the delivery pipe to the
intake manifold.
(l) Check that the injectors rotate smoothly.
HINT: If injectors do not rotate smoothly, the probable cause
is incorrect installation of O±rings. Replace the O±rings.
(m) Position the injector connector upward.
(n) Tighten the 3 bolts holding the delivery pipe to the intake
manifold.
Torque: 21 NVm (210 kgfVcm, 15 ftVlbf)
2. INSTALL ACTUATOR FOR ACIS
(a) Install the actuator with the 2 bolts.
Torque: 6.8 NVm (70 kgfVcm, 61 in.Vlbf)
(b) Inspect the intake air control valve.
(See intake air control valve inspection in ACIS)
3. CONNECT INJECTOR CONNECTORS
Connect the 6 injector connectors.
HINT: The No.1, No.3 and No.5 injector connectors are dark
gray, and the No.2, No.4 and No.6 injector connectors are
gray.
4. CONNECT FUEL INLET PIPE TO DELIVERY PIPE
Connect the inlet pipe with 2 new gaskets and the union bolt.
Torque: 41 NVm (420 kgfVcm, 30 ftVlbf)
5. CONNECT FUEL RETURN PIPE TO FUEL PRESSURE
REGULATOR
Connect the return pipe with 2 new gaskets and the union
bolt.
Torque: 27 NVm (280 kgfVcm, 20 ftVlbf)
6. Except California:
CONNECT VACUUM SENSING HOSE TO FUEL PRES-
SURE REGULATOR
± ENGINESFI SYSTEM (2JZ±GE)EG±211

7. INSTALL AIR INTAKE CHAMBER STAYS
HINT: The No.1 stay is marked with ºFº, and No.2 stay is
marked with ºRº.
(a) Install the No.1 stay with the bolt and nut.
Torque: 18 NVm (185 kgfVcm, 13 ftVlbf)
(b) Install the No.2 stay with the bolt and nut.
Torque: 18 NVm (185 kgfVcm, 13 ftVlbf)
8. INSTALL THROTTLE BODY AND INTAKE AIR
CONNECTOR ASSEMBLY
(a) Install a new gasket to the air intake chamber, facing the
protrusion rearward.
(b) Place the throttle body and intake air connector assembly on
the cylinder head.
(c) Connect these hoses:
w3 vacuum hoses (from No.2 vacuum pipe) to No.1
vacuum pipe
wWater bypass hose (from water outlet) to throttle body
wVacuum hose (from actuator for ACIS) to No.1 vacuum
pipe
(d) Install the 4 bolts and 2 nuts holding the intake air connector
to the air intake chamber.
Torque: 27 NVm (270 kgfVcm, 20 ftVlbf)
(e) Install the nut holding the VSV for the ACIS to the air intake
chamber.
(f) Connect these connectors and hoses:
wThrottle position sensor connector
wIAC valve connector
wVSV connector for EGR
wPCV hose to intake air connector
wWater bypass hose (from No.2 water bypass pipe) to
throttle body
wCalifornia only:
Air hose to IAC valve
9. INSTALL THROTTLE BODY BRACKET
Torque: 21 NVm (210 kgfVcm, 15 ftVlbf)
10. INSTALL NO.2 VACUUM PIPE
Torque: 27 NVm (270 kgfVcm, 20 ftVlbf)
11. CONNECT EGR GAS TEMPERATURE SENSOR
CONNECTOR
12. INSTALL EGR PIPE
(a) Temporarily install the union nut of the EGR pipe.
(b) Install a new gasket and the EGR pipe to the cylinder head
with the 2 bolts.
Torque: 27 NVm (270 kgfVcm, 20 ftVlbf)
(c) Tighten the union nut of the EGR pipe. EG±212
± ENGINESFI SYSTEM (2JZ±GE)

Torque: 64 NVm (650 kgfVcm, 47 ftVlbf)
13. California only:
INSTALL VSV FOR FUEL PRESSURE CONTROL
14. INSTALL INTAKE AIR CONNECTOR PIPE
15. CONNECT CONTROL CABLES TO THROTTLE BODY
16. FILL WITH ENGINE COOLANT
17. CHECK FOR FUEL LEAKS
(See item 5 in fuel system in precaution)
FUEL PRESSURE PULSATION DAMPER
COMPONENTS FOR REMOVAL AND
INSTALLATION
FUEL PRESSURE PULSATION DAMPER
REMOVAL
1. REMOVE STARTER
(See starter removal in Starting System)
2. REMOVE FUEL PRESSURE PULSATION DAMPER
(a) Remove the pulsation damper and upper gasket.
(b) Disconnect the fuel inlet pipe from the fuel pipe support, and
remove the lower gasket.
± ENGINESFI SYSTEM (2JZ±GE)EG±213

FUEL PRESSURE PULSATION DAMPER
INSTALLATION
1. INSTALL FUEL PRESSURE PULSATION DAMPER
(a) Install the fuel inlet pipe and pulsation damper with 2 new
gaskets.
HINT: Different sized gaskets are used for the upper (large
size) and lower (small size).
(b) Using SST, tighten the pulsation damper.
SST 09612±24014 (09617±24011)
Torque:
41 NVm (420 kgfVcm, 30 ftVlbf)
35 NVm (350 kgfVcm, 25 ftVlbf) for SST
HINT: Use a torque wrench with a fulcrum length of 30 cm
(11.81 in.).
2. INSTALL STARTER
(See starter installation in Starting System)
4. CHECK FOR FUEL LEAKS
(See item 5 in fuel system in precaution) EG±214
± ENGINESFI SYSTEM (2JZ±GE)