TOYOTA SUPRA 1995 Service Repair Manual

(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)

FUEL TANK AND LINE
COMPONENTS
± ENGINESFI SYSTEM (2JZ±GE)EG±215

PRECAUTIONS
1. Always use new gaskets when replacing the fuel tank or
component parts.
2. Apply the proper torque to all parts tightened.
FUEL LINES AND CONNECTIONS
INSPECTION
(a) Check the fuel lines for cracks or leakage, and all
connections for deformation.
(b) C h e c k t h e f u e l t a n k vapor vent system hoses and
connections for looseness, sharp bends or damage.
(c) Check the fuel tank for deformation, cracks, fuel leakage or
tank band looseness.
(d) Check the filler neck for damage or fuel leakage.
(e) Hose and tube connections are as shown in the illustration.
If a problem is found, repair or replace the part as necessary. EG±216
± ENGINESFI SYSTEM (2JZ±GE)

VOLUME AIR FLOW (VAF) METER
ON±VEHICLE INSPECTION
INSPECT VAF METER RESISTANCE
(a) Disconnect the VAF meter connector.
(b) Usin g an oh mme te r, me a su re th e re sista n ce be twe e n
terminals THA and E2.
 
 Between
terminals 
 Resistance
 
 Temperature
 THA E210 20 k
20°C( 4°F)THA±E210±20 k
±20°C (±4°F) 
THA E247k
0°C (32°F) THA±E24±7 k
0°C (32°F)
THA E223k
20°C (68°F) THA±E22±3 k
20°C (68°F)
 THA E209 13k
40°C (104°F)

THA±E20.9±1.3 k
40°C (104°F)
 THA E204 07k
60°C (140°F)THA±E20.4±0.7 k
60°C (140°F)
If the resistance is not as specified, replace the VAF meter.
(c) Reconnect the VAF meter connector.
COMPONENTS FOR REMOVAL AND
INSTALLATION
± ENGINESFI SYSTEM (2JZ±GE)EG±217

VAF METER REMOVAL
Installation is in the reverse order of removal.
1. 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.
2. REMOVE VAF METER
(a) Disconnect the VAF meter connector.
(b) Disconnect the VAF meter wire from the wire clamp on the
bracket.
(c) Remove the 4 nuts, bolt, VAF meter and gasket.
Torque: 10 NVm (100 kgfVcm, 7 ftVlbf)
VAF METER INSPECTION
INSPECT VAF METER
Check that the honeycomb is neither deformed nor dam-
aged.
If necessary, replace the VAF meter. EG±218
± ENGINESFI SYSTEM (2JZ±GE)

THROTTLE BODY
ON±VEHICLE INSPECTION
Throttle Body
INSPECT THROTTLE BODY
(a) Check that the throttle linkage moves smoothly.
(b) Check the vacuum at each port.
wStart the engine.
wCheck the vacuum with your finger.
 Port name At idle At 3,000 rpm
 P No vacuum Vacuum 
 E
 
 No vacuum
 
 Vacuum
 R No vacuum Vacuum
Throttle Position Sensor
INSPECT THROTTLE POSITION SENSOR
(a) Disconnect the throttle position sensor connector.
(b) Disconnect the throttle opener vacuum hose from the throttle
body.
(c) Apply vacuum to the throttle opener.
(d) Insert a feeler gauge between the throttle stop screw and
stop lever.
(e) Using an ohmmeter, measure the resistance between each
terminal.
 
 
Clearance between
Lever and stop screw 
 Between terminals 
 Resistance
 0 mm (0 in.) VTA±E2 0.34±6.3 k

 0.40 mm (0.016 in.) IDL±E2 0.5 k
or less
 0.60 mm (0.024 in.) IDL±E2 Infinity 
 
 
Throttle valve fully
Open
 
 
 
VTA±E2
 
 
 
2.4±11.2 k

 ± VC±E2 3.1±7.2 k

(f) Reconnect the throttle position sensor connector.
(g) Reconnect the throttle opener vacuum hose to the throttle
body.
± ENGINESFI SYSTEM (2JZ±GE)EG±219

Dashpot
1. WARM UP ENGINE
Allow the engine to warm up to normal operating tempera-
ture.
2. CHECK IDLE SPEED
Idle speed (Transmission in neutral position):
700 + 50 rpm
3. CHECK AND ADJUST DASHPOT SETTING SPEED
(a) Disconnect the control cables from the throttle body.
(b) Push the dashpot push rod all the way with a screwdriver.
(c) Check that the dashpot is set.
Dashpot setting speed:
M/T
2,600 + 400
A/T
1,800 + 400 rpm
(d) Adjust the dashpot setting speed by turning the dashpot
adjusting screw.
(e) Reconnect the control cables to the throttle body.
4. CHECK VTV OPERATION
(a) Maintain the engine speed at 3,500 rpm.
(b) Release the throttle valve, and check that the engine returns
to idle in a few seconds.
Throttle Opener
1. WARM UP ENGINE
Allow the engine to warm up to normal operating tempera-
ture.
2. CHECK IDLE SPEED
Idle speed (Transmission in neutral position):
700 + 50 rpm
3. CHECK THROTTLE OPENER SETTING SPEED
(a) Disconnect the throttle opener vacuum hose from the throttle
body, and plug the throttle body port.
(b) Maintain the engine speed at 2,500 rpm.
(c) Release the throttle valve.
(d) Check that the throttle opener is set.
Throttle opener setting speed:
1,500 + 400 rpm
If the throttle opener setting speed is not as specified, replace
the throttle body.
(e) Reconnect the throttle opener vacuum hose to the throttle
body. EG±220
± ENGINESFI SYSTEM (2JZ±GE)