1986 TOYOTA SUPRA engine oil

IF VEHICLE IS EQUIPPED WITH MOBIL
RADIO SYSTEM (HAM, CB, ETC.)
If the vehicle is equipped with a mobile communication sys-
tem, refer to the precaution in the IN section.
AIR INDUCTION SYSTEM
1. Separation of the engine oil dipstick, oil filler cap, PCV hose,
etc. may cause the engine to run out of tune.
2. Disconnection, looseness or cracks in the parts of the air
induction system between the throttle body and cylinder
head will cause air suction and cause the engine to run out
of tune.
ELECTRONIC CONTROL SYSTEM
1. Before removing SFI wiring connectors, terminals, etc., first
disconnect the power by either turning the ignition switch
OFF or disconnecting the negative (±) terminal cable from the
battery.
HINT: Always check the diagnostic trouble code before dis-
connecting the negative (±) terminal cable from the battery.
2. When installing the battery, be especially careful not to
incorrectly connect the positive (+) and negative (±) cables.
3. Do not permit parts to receive a severe impact during removal
or installation. Handle all SFI parts carefully, especially the
ECM.
4. Do not be careless during troubleshooting as there are
numerous transistor circuits and even slight terminal contact
can cause further troubles.
5. Do not open the ECM cover.
6. When inspecting during rainy weather, take care to prevent
entry of water. Also, when washing the engine compartment,
prevent water from getting on the SFI parts and wiring
connectors.
7. Parts should be replaced as an assembly.
8. Care is required when pulling out and inserting wiring
connectors.
(a) Release the lock and pull out the connector, pulling on the
connectors.
(b) Fully insert the connector and check that it is locked. EG±190
± ENGINESFI SYSTEMS (2JZ±GE)

9. Use SST for inspection or test of the injector or its wiring
connector.
SST 09842±30070
FUEL SYSTEM
1. When disconnecting the high pressure fuel line, a large
amount of gasoline will spill out, so observe the following
procedures:
(a) Disconnect the fuel pump connector.
(b) Start the engine. After the engine has stopped on its own,
turn off the ignition switch.
(c) Put a container under the connection.
(d) Slowly loosen the connection.
(e) Disconnect the connection.
(f) Plug the connection with a rubber plug.
(g) Reconnect the fuel pump connector.
2. When connecting the flare nut or union bolt on the high
pressure pipe union, observe the following procedures:
Union Bolt Type:
(a) Always use a new gasket.
(b) Tighten the union bolt by hand.
(c) Tighten the union bolt to the specified torque.
Torque: 29 NVm (300 kgfVcm, 22 ftVlbf)
Flare Nut Type:
(a) Apply a light coat of engine oil to the flare nut, and tighten the
flare nut by hand.
(b) Using SST, tighten the flare nut to specified torque.
SST 09631±22020
Torque: 30 NVm (310 kgfVcm, 22 ftVlbf)
HINT: Use a torque wrench with a fulcrum length of 30 cm
(11.81 in.).
± ENGINESFI SYSTEM (2JZ±GE)EG±191

3. Observe the following precautions when removing and
installing the injectors.
(a) Never reuse the O±ring.
(b) When placing a new O±ring on the injector, take care not to
damage it in any way.
(c) Coat a new O±ring with spindle oil or gasoline before
installing±never use engine, gear or brake oil.
4. Install the injector to the delivery pipe and intake manifold as
shown in the illustration.
5. Check that there are no fuel leaks after doing maintenance
anywhere on the fuel system.
(a) Using SST, connect terminals +B and FP of the DLC 1.
SST 09843±18020
(b) With engine stopped, turn the ignition switch ON.
(c) Pinch the fuel return hose.
The pressure in the high pressure line will rise to approx. 392
kPa (4 kgf/cm
2, 57 psi). In this state, check to see that there
are no leaks from any part of the fuel system.
NOTICE: Always pinch the hose. Avoid bending as it may
cause the hose to crack.
(d) Turn the ignition switch OFF.
(e) Remove the SST from the DLC1.
SST 09843±18020 EG±192
± ENGINESFI SYSTEM (2JZ±GE)

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, 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:
0.2±3.0
at 205C (685F)
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:

These tests must be performed quickly (within 10 seconds)
to prevent the coil from burning out.

Keep the fuel pump as far away from the battery as possible.

Always connect or disconnect at the battery.
If operation is not as specified, replace the fuel pump, lead
wire or fuel pump bracket. EG±196
± ENGINESFI SYSTEM (2JZ±GE)

Vacuum Tank
COMPONENTS FOR REMOVAL AND
INSTALLATION
VACUUM TANK REMOVAL
Installation is in the reverse order of removal.
1. REMOVE OIL DIPSTICK AND GUIDE FOR A/T
(a) Remove the bolt.
(b) Pull out the dipstick guide together with the dipstick.
INSTALLATION HINT: Apply soapy water to the O±ring, and
push in the dipstick guide.
(c) Remove the O±ring from the dipstick guide.
INSTALLATION HINT: Use a new O±ring.
2. REMOVE VACUUM TANK AND VSV ASSEMBLY
(a) Remove the 2 nuts, and disconnect the vacuum tank from the
intake manifold.
Torque: 21 NVm (210 kgfVcm, 15 ftVlbf)
± ENGINESFI SYSTEM (2JZ±GE)EG±229

INTAKE AIR CONTROL VALVE REMOVAL
Installation is in the reverse order of removal.
1. 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
2. REMOVE OIL DIPSTICK AND GUIDE FOR A/T
(a) Remove the bolt.
(b) Pull out the dipstick guide together with the dipstick.
INSTALLATION HINT: Apply soapy water to the O±ring, and
push in the dipstick guide.
(c) Remove the O±ring from the dipstick guide.
INSTALLATION HINT: Use a new O±ring.
3. REMOVE OIL DIPSTICK AND GUIDE FOR ENGINE
(a) Disconnect the fuel return hose from the clamp of the dipstick
guide.
(b) Remove the bolt.
(c) Pull out the dipstick guide together with the dipstick.
INSTALLATION HINT: Apply soapy water to the O±ring, and
push in the dipstick guide.
(d) Remove the O±ring from the dipstick guide.
INSTALLATION HINT: Use a new O±ring.
4. REMOVE EGR PIPE
(a) Loosen the union nut of the EGR pipe.
Torque: 64 NVm (650 kgfVcm, 47 ftVlbf)
(b) Remove the 2 bolts, EGR pipe and gasket.
Torque: 27 NVm (270 kgfVcm, 20 ftVlbf)
5. 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.
6. 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.
Torque: 27 NVm (270 kgfVcm, 20 ftVlbf)
EG±232± ENGINESFI SYSTEM (2JZ±GE)

FUEL CUT RPM
FUEL CUT RPM INSPECTION
1. WARM UP ENGINE
Allow the engine to warm up to normal operating tempera-
ture.
2. CONNECT TACHOMETER TO ENGINE
Connect the tester probe of a tachometer to terminal IG
of
the DLC1.
NOTICE:
wNever allow the tachometer terminal to touch ground as
it could result in damage to the igniter and/or ignition
coil.
wAs some tachometers are not compatible with this igni-
tion system, we recommend that you confirm the compat-
ibility of your unit before use.
3. INSPECT FUEL CUTOFF OPERATION
(a) Increase the engine speed to at least 3,000 rpm.
(b) Check for injector operating noise.
(c) Check that when the throttle lever is released, injector
operation noise stops momentarily and then resumes.
HINT: Measure with the A/C OFF.
Fuel return speed:
1,400 rpm
4. DISCONNECT TACHOMETER
± ENGINESFI SYSTEM (2JZ±GE)EG±255

SERVICE SPECIFICATIONS
SERVICE DATA
 
 
Fuel pressure
regulator 
 
Fuel pressure at no vacuum 
 
265±304 kPa (2.7±3.1 kgf/cm2, 38±44 psi)
 Fuel pump Resistance at 20°C (68°F) 0.2±3.0

 
 
 
Injector 
 
 
Resistance
Injection volume
Difference between each cylinder
Fuel leakage 
 
 
13.4±14.2

70±88 cm3 (4.3±5.4 cu in.) per 15 sec.
9 cm
3 (0.5 cu in.) or less
One drop or less per minute
 
 
 
 
 
VAF meter
 
 
 
 
 
Resistance (THA±E2) at±20°C (±4°F)
at 0°C (32°F)
at 20°C (68°F)
at 40°C (104°F)
at 60°C (140°F)
 
 
 
 
 
10±20 k

4±7 k

2±3 k

0.9±1.3 k

0.4±0.7 k

 
 
 
 
Throttle body 
 
 
 
Throttle body fully closed angle
Dashpot setting speed M/T
A/T
Throttle opener setting speed 
 
 
 
65
2,600 + 400 rpm
1,800 + 400 rpm
1,500 + 400 rpm
 
 
 
 
 
Throttle
position
sensor 
 
 
 
 
Clearance between stop screw and lever
0 mm (0 in.) VTA±E2
0.40 mm (0.016 in.) IDL±E2
0.60 mm (0.024 in.) IDL±E2
Throttle valve fully open VTA±E2
± VC±E2 
 
 
 
 
0.34±6.3 k

0.5 k
or less
Infinity
2.4±11.2 k

3.1±7.2 k

 IAC valve Resistance B1 (or B2)±Others 18±22
 VSV for ACIS Resistance at 20°C (68°F) 38.5±44.5
 
 
 
 
 
VSV for Fuel
pressure
control
(California
only)
 
 
 
 
 
Resistance at 20°C (68°F)
 
 
 
 
 
33±39

 VSV for EVAP Resistance at 20°C (68°F) 27±33

 VSV for EGR Resistance at 20°C (68°F) 38.5±44.5
 
 
 
 
 
 
ECT sensor 
 
 
 
 
 
Resistance at ±20°C (±4°F)
at 0°C (32°F)
at 20°C (68°F)
at 40°C (104°F)
at 60°C (140°F)
at 80°C (176°F) 
 
 
 
 
 
10±20 k

4±7 k

2±3 k

0.9±1.3 k

0.4±0.7 k

0.2±0.4 k

 
 
EGR gas
temperature
sensor 
 
Resistance at 50°C (122°F)
at 100°C (212°F)
at 150°C (302°F) 
 
64±97 k

11±16 k

2±4 k

 
 
 
Main heated
oxygen sensor
(California)
 
 
 
Heater coil resistance at 20°C (68°F)
 
 
 
11±16

EG±256± ENGINESFI SYSTEM (2JZ±GE)