1986 TOYOTA SUPRA fuel pressure

INJECTORS REMOVAL
Installation is in the reverse order of removal.
1. REMOVE ENGINE UNDER COVER
2. REMOVE THROTTLE BODY
(See throttle body removal)
3. 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.
4. 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.
5. REMOVE AIR INTAKE CHAMBER STAY
Remove the bolt, nut and chamber stay.
Torque: 19 NVm (195 kgfVcm, 14 ftVlbf)
6. DISCONNECT CONTROL CABLE BRACKET FROM AIR
INTAKE CHAMBER
Remove the 2 bolts, and disconnect the cable bracket from
the air intake chamber.
Torque: 19 NVm (195 kgfVcm, 14 ftVlbf)
7. DISCONNECT CONNECTORS AND HOSES
(a) Disconnect these connectors:
(1) IAC valve connector
(2) Turbo pressure sensor connector
(3) VSV connector for fuel pressure control
(4) VSV connector for EGR
(b) Remove the bolt, and disconnect the engine wire protector
from the body.
± ENGINESFI SYSTEM (2JZ±GTE)EG±275

(c) Disconnect these hoses:
(1) Air hose from IAC valve
Disconnect the IAC valve pipe from the clamp on the cyl-
inder head cover, and disconnect the air hose from the
IAC valve.
(2) Air hose (from air intake chamber) from vacuum pipe on
IAC valve pipe
(3) Air hose for EGR from valve pipe
(4) PCV hose from PCV valve
(5) Vacuum sensing hose from fuel pressure regulator
(6) Water bypass hose (from IAC valve) from No.4 water by-
pass pipe
(7) EVAP hose (from air intake chamber) from vacuum pipe
on manifold stay
(8) EVAP hose (from vacuum pipe on No.4 water bypass
pipe) from No.2 vacuum pipe
(9) EVAP hose (from charcoal canister) from No.2 vacuum
pipe
(10) PS air hose from air intake chamber
(11) Brake booster vacuum hose from union on air intake
chamber
8. 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.
9. REMOVE EGR PIPE
(a) Remove the union bolt holding the EGR pipe to the EGR
valve.
Torque: 64 NVm (650 kgfVcm, 47 ftVlbf)
(b) Remove the 2 bolts, EGR pipe and gasket.
INSTALLATION HINT: Use a new gasket.
Torque: 27 NVm (270 kgfVcm, 20 ftVlbf)
10. REMOVE NO.4 WATER BYPASS PIPE
Remove the 2 bolts and water bypass pipe.
11. REMOVE MANIFOLD STAY
Remove the 2 bolts and manifold stay.
Torque: 39 NVm (400 kgfVcm, 29 ftVlbf)
EG±276± ENGINESFI SYSTEM (2JZ±GTE)

15. DISCONNECT FUEL RETURN PIPE FROM FUEL
PRESSURE REGULATOR
Remove the union bolt and 2 gaskets, and disconnect the
fuel pipe from the pressure regulator.
INSTALLATION HINT: Use 2 new gaskets.
Torque: 27 NVm (280 kgfVcm, 20 ftVlbf)
CAUTION:
wPut a shop towel under the pressure regulator.
wSlowly loosen the union bolt.
16. REMOVE DELIVERY PIPE AND INJECTORS
(a) Remove the 6 bolts and 3 injector holders.
Torque: 7.8 NVm (80 kgfVcm, 69 in.Vlbf)
(b) Remove the 6 insulators from the injectors.
INSTALLATION HINT: Use 6 new insulators.
(c) Re mo ve th e 2 bo lts, th e de live ry pip e an d 6 in je cto rs
assembly.
Torque: 21 NVm (210 kgfVcm, 15 ftVlbf)
(d) Remove the 2 spacers from the intake manifold. EG±278
± ENGINESFI SYSTEM (2JZ±GTE)

(c) Remove the union bolt and 2 gaskets, and disconnect the
fuel inlet hose from the fuel filter outlet.
(d) 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)
(e) Disconnect the fuel return hose from the fuel return pipe.
(f) Connect the fuel return hose to the fuel outlet of the pressure
regulator on the delivery pipe with SST (union), the 2 gaskets
and union bolt.
SST 09268±41045 (09268±41070) EG±280
± ENGINESFI SYSTEM (2JZ±GTE)

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.
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).
± ENGINESFI SYSTEM (2JZ±GTE)EG±283

VSV FOR FUEL PRESSURE CONTROL
COMPONENTS FOR REMOVAL AND
INSTALLATION
VSV INSPECTION
1. REMOVE VSV
2. INSPECT VSV
A. Inspect VSV for open circuit
Using an ohmmeter, check that there is continuity between
the terminals.
Resistance:
At 20°C (68°F) 33±39

If there is no continuity, replace the VSV.
B. Inspect VSV for ground
Using an ohmmeter, check that there is no continuity be-
tween each terminal and the body.
If there is continuity, replace the VSV.
± ENGINESFI SYSTEM (2JZ±GTE)EG±301

SERVICE SPECIFICATIONS
SERVICE DATA
 
 Fuel pressure
regulator 
 Fuel pressure at no vacuum 
 226±275 kPa (2.3±2.8 kgf/cm2, 33±40 psi)
 Fuel pump Resistance at 20°C (68°F) 0.1±3.0
 
 
 
 
Injector 
 
 
 
Resistance
Injection volume
Difference between each cylinder
Fuel leakage 
 
 
 
Approx. 1.95

124±144 cm3 (7.6±8.8 cu in.) per 15 sec.
10 cm
3 (0.6 cu in.) or less
One drop or less per minute
 
 
 
 
MAF 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
Throttle opener setting speed 
 
 
10°
2,300 + 400 rpm
1,500 + 200 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

 
 
 
 
 
Sub±throttle
position
sensor 
 
 
 
 
Clearance between stop screw and lever
0 mm (0 in.) VTA±E2
0.30 mm (0.012 in.) IDL±E2
0.50 mm (0.020 in.) IDL±E2
Throttle valve fully open VTA±E2
± VC±E2 
 
 
 
 
0.3±6.3 k

0.5 k
or less
Infinity
2.0±10.8 k

3.5±6.5 k

 
 
Sub±throttle
actuator 
 
Resistance ACM±A and A±, BCM±B and B± 
 
0.82±0.98

 IAC valve Resistance B1 (or B2)±Others 18±24

 
 
Solenoid
resistor 
 
Resistance +B±Others 
 
Approx. 6

 
 
 
VSV for Fuel
pressure
control 
 
 
Resistance at 20°C (68°F) 
 
 
33±39

 
 
VSV for intake
air control
valve 
 
Resistance at 20°C (68°F) 
 
38.5±44.5

 
 
 
VSV for
exhaust gas
control valve 
 
 
Resistance at 20°C (68°F) 
 
 
38.5±44.5

 
 VSV for waste
gate valve 
 Resistance at 20°C (68°F) 
 22±26

 
 
 
VSV for
exhaust
bypass valve 
 
 
Resistance at 20°C (68°F) 
 
 
22±26

± ENGINESFI SYSTEM (2JZ±GTE)EG±327

 VSV for EVAP Resistance at 20°C (68°F) 30±34

 VSV for EGR Resistance at 20°C (68°F) 30±34

 
 
 
 
 
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 Heater coil resistance at 20°C (68°F) 11±16

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

 Fuel cut rpm Fuel return rpm 1,100 rpm
TORQUE SPECIFICATIONS
 Part tightened NVm kgfVcm ftVlbf
Fuel line for union bolt2930022 for flare nut 30 310 22 Fuel pressure regulator x Delivery pipe 8.8 90 78 in.Vlbf Delivery pipe x Intake manifold 21 210 15 Injector holder x Delivery pipe 7.8 80 69 in.Vlbf Fuel inlet pipe x Delivery pipe 41 420 30 Fuel return pipe x Fuel pressure regulator 27 280 20 Air intake chamber x Intake manifold 27 280 20 Manifold stay x Air intake chamber 39 400 29
 Manifold stay x Cylinder head 39 400 29
 EGR pipe x Cylinder head 27 270 20
 EGR pipe x EGR valve 64 650 47
 Control cable bracket x Air intake chamber 19 195 14
 Air intake chamber stay x Intake manifold 19 195 14
 Air intake chamber stay x Control cable bracket 19 195 14
 
 
Fuel pressure pulsation damper x Fuel pipe support
for SST 
 
41
35 
 
420
350 
 
30
25
 Fuel tank band x Body 39 400 29
 MAF meter x Air cleaner case 6.9 70 61 in.Vlbf
Throttle body x Air intake chamber2121015 
IAC valve x Air intake chamber
 
21
 
210
 
15 
EGR gas temperature sensor x EGR valve
 
20
 
200
 
14 Knock sensor x Cylinder block 44 450 33 Main heated oxygen sensor x Exhaust manifold 20 200 14 Sub heated oxygen sensor x Center exhaust pipe 20 200 14 
 Upper front crossmember extension x Front suspension Bolt
Nut 
 29
33 
 300
340 
 22
25
 
 
Front lower arm bracket stay x Front suspension Bolt
Nut 
 
44
59 
 
450
600 
 
33
43
EG±328± ENGINESFI SYSTEM (2JZ±GTE)