1986 TOYOTA SUPRA fuel filter

Troubleshooting
If the CO/HC concentration does not comply with regulations,
troubleshoot in the order given below.
(a) Check (main heated) oxygen sensors operation.
(See oxygen sensor(s) inspection in SFI System)
(b) See the table below for possible causes, and then inspect
and correct the applicable causes if necessary.
 CO HC Phenomenon Causes
 
 
 
 
 
 
 
 
Normal 
 
 
 
 
 
 
 
High 
 
 
 
 
 
 
 
Rough idle 
 
 
 
 
 
 
 
1. Faulty ignitions:

Incorrect timing

Fouled, shorted or improperly gapped plugs

Open or crossed high±tension cords (2JZ±GE)

Cracked distributor cap (2JZ±GE)
2. Incorrect valve clearance
3. Leaky EGR valve
4. Leaky intake and exhaust valves
5. Leaky cylinder
 
 
 
 
 
 
 
 
Low 
 
 
 
 
 
 
 
High 
 
 
 
 
 
 
 
Rough idle
(Fluctuating HC reading) 
 
 
 
 
 
 
 
1. Vacuum leaks:

PCV hose

EGR valve

Intake manifold

Air intake chamber

Throttle body

IAC valve

Brake booster line
2. Lean mixture causing misfire
 
 
 
 
 
 
 
 
 
 
High 
 
 
 
 
 
 
 
 
 
High 
 
 
 
 
 
 
 
 
 
Rough idle
(Black smoke from exhaust) 
 
 
 
 
 
 
 
 
 
1. Restricted air filter
2. Faulty SFI systems:

Faulty fuel pressure regulator

Clogged fuel return line

Defective ECT switch

Defective turbo pressure sensor (2JZ±GTE)

Faulty ECM

Faulty injector

Faulty throttle position sensor

Faulty VAF meter (2JZ±GE)

Faulty MAF meter (2JZ±GTE)
EG±8± ENGINEENGINE MECHANICAL

ENGINE REMOVAL (2JZ±GE)
1. REMOVE HOOD
2. REMOVE RADIATOR ASSEMBLY
(See radiator removal in Cooling System)
3. DRAIN ENGINE OIL
4. DRAIN FUEL FROM FUEL TANK
5. DISCONNECT CONTROL CABLES FROM THROTTLE
BODY
Disconnect these cables:
wAccelerator cable
wCruise control actuator cable
6. REMOVE AIR CLEANER, VAF METER AND INTAKE AIR
CONNECTOR PIPE ASSEMBLY
(a) Disconnect the high±tension cord from the ignition coil.
(b) Disconnect the high±tension cord from the clamp on the air
cleaner.
(c) Disconnect the VAF meter connector.
(d) Disconnect the engine wire from the VAF meter.
(e) Disconnect these hoses:
(1) PS air hose from No.4 timing belt cover
(2) PCV hose from No.2 cylinder head cover
(f) Loosen the hose clamp bolt holding the intake air connector
pipe to the throttle body.
(g) Remove the 3 bolts, air cleaner, VAF meter and intake air
connector pipe assembly.
7. REMOVE DRIVE BELT, FAN, FLUID COUPLING
ASSEMBLY AND WATER PUMP PULLEY
(See step 6 in water pump removal in Cooling System)
8. REMOVE CHARCOAL CANISTER
9. DISCONNECT HEATER WATER HOSES
10. DISCONNECT BRAKE BOOSTER VACUUM HOSE
11. DISCONNECT EVAP HOSE
12. DISCONNECT WIRES AND CONNECTORS
(a) Disconnect the noise filter connector.
(b) Disconnect the ignition coil connector.
(c) Disconnect the engine wire from the wire clamp. EG±78
± ENGINEENGINE MECHANICAL

PREPARATION FOR DISASSEMBLY
1. M/T:
REMOVE FLYWHEEL
2. A/T:
REMOVE DRIVE PLATE
3. INSTALL ENGINE TO ENGINE STAND FOR
DISASSEMBLY
4. REMOVE GENERATOR
5. REMOVE TIMING BELT AND PULLEYS
(See timing belt removal)
6. REMOVE CYLINDER HEAD
(See cylinder head removal)
7. REMOVE OIL FILTER
(See oil and filter replacement in Lubrication System)
8. 2JZ±GTE:
REMOVE OIL COOLER
(See oil cooler removal in Lubrication System)
9. REMOVE NO.2 WATER BYPASS PIPE
(a) 2JZ±GE:
Remove the bolt, 2 nuts, water bypass pipe and gasket.
(b) 2JZ±GTE:
Remove the 2 bolts, 2 nuts, water bypass pipe and gasket.
10. REMOVE OIL FILTER BRACKET
Remove the union bolt, gasket, oil filter bracket and O ±ring.
11. REMOVE LH ENGINE MOUNTING BRACKET AND
INSULATOR ASSEMBLY
12. REMOVE FUEL PIPE SUPPORT EG±98
± ENGINEENGINE MECHANICAL

8. INSTALL FUEL PIPE SUPPORT
Torque: 14 NVm (145 kgfVcm, 10 ftVlbf)
9. INSTALL LH ENGINE MOUNTING BRACKET AND
INSULATOR ASSEMBLY
HINT: LH mounting bracket is marked ºA u INº.
Torque: 58 NVm (590 kgfVcm, 43 ftVlbf)
10. INSTALL OIL FILTER BRACKET
(a) Check and clean the oil filter bracket installation.
(b) Place a new O±ring in position on the oil filter bracket.
(c) Apply clean engine oil to the O±ring.
(d) Install a new gasket to the union bolt.
(e) Install the oil filter braket with the union bolt.
Torque: 88 NVm (900 kgfVcm, 65 ftVlbf)
11. INSTALL NO.2 WATER BYPASS PIPE
(a) Install a new gasket to the water pump.
(b) 2JZ±GE:
Install the water bypass pipe with the bolt and 2 nuts.
Torque: 21 NVm (210 kgfVcm, 15 ftVlbf)
(c) 2JZ±GTE:
Install the water bypass pipe with the 2 bolts and 2 nuts.
Torque: 21 NVm (210 kgfVcm, 15 ftVlbf)
12. 2JZ±GTE:
INSTALL OIL COOLER
(See oil cooler installation in Lubrication System)
13. INSTALL OIL FILTER
(See oil and filter replacement in Lubrication System)
14. INSTALL CYLINDER HEAD
(See cylinder head installation)
15. INSTALL TIMING PULLEYS AND BELT
(See timing belt installation)
16. INSTALL GENERATOR
(See generator installation in Charging System)
17. REMOVE ENGINE STAND FROM ENGINE
18. M/T:
INSTALL FLYWHEEL
HINT: The flywheel bolts are tightened in 2 progressive step,
(b) and (d).
(a) Install the flywheel on the crankshaft.
(b) Install and uniformly tighten the 8 bolts, in several passes, in
the sequence shown.
Torque: 49 NVm (500 kgfVcm, 36 ftVlbf)
EG±122± ENGINEENGINE MECHANICAL

 Connecting rod cap X Connecting rod 1st
2nd 29
Turn 905 300 22
 
Oil nozzle X Crankshaft (2JZ±GTE)
 
8.8
 
90
 
78 in.Vlbf Rear oil seal retainer X Cylinder block 5.9 60 52 in.Vlbf Crankshaft position sensor X Cylinder block (2JZ±GTE) 8.8 90 78 in.Vlbf Engine mounting bracket X Cylinder block 58 590 43 Engine coolant drain plug X Cylinder block 29 300 22 Union for oil cooler X Cylinder block (2JZ±GTE) 39 400 29
 Knock sensor X Cylinder block 44 450 33
 Oil pressure switch X Cylinder block 14 150 11
 Fuel pipe support X Cylinder block 14 145 10
 Oil filter bracket X Cylinder block 88 900 65
 No.2 water bypass pipe X Water pump 21 210 15
 No.2 water bypass pipe X Cylinder block 21 210 15
 Flywheel X Crankshaft (M/T) 1st
2nd 49
Turn 905 500 36
 Drive plate X Crankshaft (A/T) 83 850 61 Clutch cover X Flywheel (M/T) 19 195 14 
 Cylinder block X Transmission 14 mm head
17 mm head 
 39
72 
 400
730 
 29
43
 Clutch service hole cover X Clutch housing (2JZ±GTE M/T) 12 120 9
 Drive plate X Torque converter clutch (A/T) 33 340 25
 Oil cooler tube X Union for transmission (A/T) 34 350 25
 Rear support member X Body 25 260 19
 Rear support member X Engine rear mounting insulator 13 135 10
 Front suspension crossmember X Engine mounting insulator 59 600 43
 Transmission shift lever X Shift lever retainer (M/T) 19 195 14
 Transmission control rod X Shift lever (A/T) 13 130 9
Clutch release cylinder X Transmission (M/T)131309 
Clutch line tube X No.1 oil pan
 
37
 
380
 
27 Ground strap X Transmission (M/T) 37 380 27 Fuel inlet hose X Fuel pipe support 29 300 22 
 A/C compressor X Cylinder block for stud bolt
for bolt and nut 
 26
52 
 265
530 
 19
38
 PS pump front bracket X Cylinder block (2JZ±GE) 58 590 43
 PS pump front bracket X Oil pump (2JZ±GE) 52 530 38
 PS pump housing X PS pump bracket 58 590 43
 PS pump bracket X A/C compressor 58 590 43
 PS pump bracket X Cylinder block 39 400 29
 PS pump rear stay X PS pump bracket 39 400 29
 PS pump rear stay X Intake manifold stay (2JZ±GE) 39 400 29
 Rear center floor crossmember brace X Body (2JZ±GTE) 28 290 21
No.2 front exhaust pipe X Exhaust manifold6263046 No.2 front exhaust pipe X Front exhaust pipe 58 590 43 Pipe support bracket X Transmission 43 440 32 Front exhaust pipe X Center exhaust pipe 58 590 43 Center exhaust pipe X Tailpipe 19 195 14 
 
Sub heated oxygen sensor
x Front exhaust pipe (2JZ±GE (California), 2JZ±GTE) 
 
20 
 
200 
 
14
± ENGINEENGINE MECHANICALEG±139

EVAPORATIVE EMISSION (EVAP)
CONTROL SYSTEM
FUEL VAPOR LINES, FUEL TANK AND
TANK CAP INSPECTION
1. VISUALLY INSPECT LINES AND CONNECTIONS
Look for loose connections, sharp bends or damage.
2. VISUALLY INSPECT FUEL TANK
Look for deformation, cracks or fuel leakage.
3. VISUALLY INSPECT FUEL TANK CAP
Check if the cap and/or gasket are deformed or damaged.
If necessary, repair or replace the cap.
CHARCOAL CANISTER INSPECTION
1. REMOVE CHARCOAL CANISTER
2. VISUALLY INSPECT CHARCOAL CANISTER
Look for cracks or damage.
3. CHECK FOR CLOGGED FILTER AND STUCK CHECK
VA LV E
(a) Using low pressure compressed air (4.71 kPa (0.048
kgf/cm
2, 0.68 psi)), blow into port C and check that air flows
without resistance from the other ports. EG±178
± ENGINEEMISSION CONTROL SYSTEMS (2JZ±GTE)

EVAPORATIVE EMISSION (EVAP)
CONTROL SYSTEM
FUEL VAPOR LINES, FUEL TANK AND
TANK CAP INSPECTION
1. VISUALLY INSPECT LINES AND CONNECTIONS
Look for loose connections, sharp bends or damage.
2. VISUALLY INSPECT FUEL TANK
Look for deformation, cracks or fuel leakage.
3. VISUALLY INSPECT FUEL TANK CAP
Check if the cap and/or gasket are deformed or damaged.
If necessary, repair or replace the cap.
CHARCOAL CANISTER INSPECTION
1. REMOVE CHARCOAL CANISTER
2. VISUALLY INSPECT CHARCOAL CANISTER
Look for cracks or damage.
3. CHECK FOR CLOGGED FILTER AND STUCK CHECK
VA LV E
(a) Using low pressure compressed air (4.71 kPa (0.048
kgf/cm
2, 0.68 psi)), blow into port B and check that air flows
without resistance from the other ports. EG±166
± ENGINEEMISSION CONTROL SYSTEMS (2JZ±GE)

25
Position of Parts in Engine Compartment
[2JZ±GTE]
I 1 Idle Air Control Valve (ISC Valve) R 1Radiator Fan Motor
I 2 Igniter R 2Radiator Fan Relay No. 1
I 3 Igniter R 3Radiator Fan Relay No. 2
I 6 Ignition Coil No. 1
I 7 Ignition Coil No. 2 S 1 SFI Resistor (EFI Resistor)
I 8 Ignition Coil No. 3 S 2Starter
I 9 Ignition Coil No. 4 S 3Starter
I 10 Ignition Coil No. 5 S 4 Sub Throttle Actuator
I 11 Ignition Coil No. 6 S 5 Sub Throttle Position Sensor
I 12 Injector No. 1
I 13 Injector No. 2 T 1 Theft Deterrent Horn
I 14 Injector No. 3 T 2 Throttle Position Sensor
I 15 Injector No. 4 T 3 Traction Brake Actuator
I 16 Injector No. 5 T 4 Traction Pump and Motor
I 17 Injector No. 6 T 14 Turbo Pressure Sensor
K 1 Knock Sensor (on Front Side) V 2 VSV (for EGR)
K 2 Knock Sensor (on Rear Side) V 3 VSV (for EVAP)
V 4 VSV (for Exhaust Bypass Valve)
M 1 Mass Air Flow (Air Flow Meter) V 5 VSV (for Exhaust Gas Control Valve)
V 6 VSV (for Fuel Pressure Up)
N 1 Noise Filter V 7 VSV (for Intake Air Control Valve)
V 8 VSV (for Waste Gate Valve)
O 1 O/D Direct Clutch Speed Sensor V 10 Vehicle Speed Sensor (Speed Sensor) No. 1 (for
O 2 Oil Pressure SW Combination Meter)
V 11 Vehicle Speed Sensor (Speed Sensor) No. 2 (for
P 1 PPS Solenoid Electronically Controlled Transmission)
P 2 Park/Neutral Position SW (Neutral Start SW),
Back±Up Light SW and A/T Indicator Light SW W 1 Washer Motor
(for A/T)