TOYOTA SUPRA 1995 Service Repair Manual

(g) Connect SST (hose) to the fuel inlet of the delivery pipe with
SST (union), the 2 gaskets and union bolt.
SST 09268±41045 (90405±09015)
(h) Put the injector into the graduated cylinder.
(i) Using SST, connect terminals +B and FP of the DLC 1.
SST 09843±18020
(j) Reconnect the negative (±) terminal cable to the battery.
(k) Turn the ignition switch ON.
NOTICE: Do not start the engine.
(l) 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±30060
Injection volume:
124±144 cm
3 (7.6±8.8 cu in.) per 15 sec.
Difference between each injector:
10 cm
3 (0.6 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±30060
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 the union bolt.
Torque: 29 NVm (300 kgfVcm, 22 ftVlbf)
(e) Reconnect the fuel return hose to the fuel return pipe.
(f) Remove the 6 bolts, 3 injector holders and 6 insulators.
± ENGINESFI SYSTEM (2JZ±GTE)EG±281

INJECTORS REPLACEMENT
1. REMOVE INJECTORS
(a) Apply gasoline between the delivery pipe and injectors.
(b) Using SST, lift up the 6 injectors.
SST 09268±74010
(c) Remove the insulator and 2 O±rings from each injector.
2. REINSTALL INJECTORS
(a) Apply a light coat of gasoline to 2 new O±rings.
(b) Install the 2 O±rings and new insulator to each injector.
(c) Push in the 6 injectors so that the injector connectors are
positioned as shown in the illustration. EG±282
± 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

(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±284
± ENGINESFI SYSTEM (2JZ±GTE)

FUEL TANK AND LINE
COMPONENTS
± ENGINESFI SYSTEM (2JZ±GTE)EG±285

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±286
± ENGINESFI SYSTEM (2JZ±GTE)

MAS AIR FLOW (MAF) METER
COMPONENTS FOR REMOVAL AND
INSTALLATION
MAF METER REMOVAL
Installation is in the reverse order of removal.
1. REMOVE NO.1 AIR HOSE
2. REMOVE AIR CLEANER HOSE
3. REMOVE MAF METER
(a) Remove the 2 bolts, and disconnect the MAF meter from the
air cleaner case.
Torque: 6.9 NVm (70 kgfVcm, 61 in.Vlbf)
(b) Disconnect the MAF meter wire from the wire clamp on the
air cleaner case.
(c) Disconnect the MAF meter connector, and remove the MAF
meter.
± ENGINESFI SYSTEM (2JZ±GTE)EG±287

MAF METER INSPECTION
1. INSPECT MAF METER RESISTANCE
Using an ohmmeter, measure the resistance between termi-
nals THA and E2.
 
 
Between
terminals 
 Resistance
 
 Temperature
 THA±E2 10±20 k
 ±20°C (±4°F)
 THA±E2 4±7 k
 0°C (32°F)
 THA±E2 2±3 k
 20°C (68°F) THA±E2 0.9±1.3 k
 40°C (104°F) THA±E2 0.4±0.7 k
 60°C (140°F)
If the resistance is not as specified, replace the MAF meter.
2. INSPECT MAF METER OPERATION
(a) Connect the MAF meter connector.
(b) Connect the negative (±) terminal cable to the battery.
(c) Using a voltmeter, connect the positive (+) tester probe to
terminal VG, and negative (±) tester probe to terminal E21.
(d) Turn the ignition switch ON.
(e) Blow air into the MAF meter, and check that the voltage
fluctuates.
If operation is not as specified, replace the MAF meter.
(f) Turn the ignition switch OFF.
(g) Disconnect the negative (±) terminal cable from the battery.
(h) Disconnect the MAF meter connector. EG±288
± ENGINESFI SYSTEM (2JZ±GTE)

THROTTLE BODY
ON±VEHICLE INSPECTION
Throttle Body
INSPECT THROTTLE BODY
(a) Check that the throttle linkage moves smoothly.
(b) Check the vacuum at the purge port.
wStart the engine.
wCheck the vacuum with your finger.
 Port name At idle At 3,000 rpm
 Purge No vacuum Vacuum
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):
650
+ 50 rpm
3. CHECK AND ADJUST DASHPOT SETTING SPEED
(a) Disconnect the control cables from the throttle body.
(b) Turn the throttle linkage until the dashpot adjusting screw
starts to separate from the push rod. Then keep the throttle
linkage at that position.
(c) Check that the dashpot is set.
Dashpot setting speed:
2,300 + 400 rpm
(d) 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.
± ENGINESFI SYSTEM (2JZ±GTE)EG±289

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):
650 + 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 + 200 rpm
(e) Adjust the throttle opener setting speed by turning the throttle
opener adjusting screw.
(f) Reconnect the throttle opener vacuum hose to the throttle
body.
COMPONENTS FOR REMOVAL AND
INSTALLATION
EG±290± ENGINESFI SYSTEM (2JZ±GTE)