1991 MITSUBISHI 3000GT coolant

15-16INTAKE AND EXHAUST - Intake Manifold
INTAKE MANIFOLD
REMOVAL AND INSTALLATION
Pre-removal Operationl Release of Residual Pressure fromHigh Pressure Fuel Hose(Refer to GROUP 13-ServiceAdjustment Procedures.)l Draining of Engine Coolant (Refer
to GROUP 00 -Maintenance Service,)
l Removal of Air Intake Plenum(Referto P.15-13, 14.)5Nm
lo-13Nm4 ft.lbs.8-9ftJbs. w2\I
Post-installation Operationl Installation of Air Intake Plenum
(Refer to P.1.5-13. 14.)l Filling of Engine Coolant
(Refer to GROUP 00 - Maintenance
Service.)
l Adjustment of Accelerator Cable(Referto GROUP 13-EngineControl.). Checkina for Fuel Leakage6
5
2 :‘;bs.)
gp,.qgs ~-zt!EJ8OSFOO24
Removal steps
I. Connection for high-pressure fuel hose
2. O-ring
3. Connection for fuel return hose
4. Connection for vacuum hoses
5. Connection for injector connector
6. Delivery pipe (with injectors)
7. Insulators
8. Timing belt upper cover
I)*9. Intake manifold mounting nut I)* 10. Intake manifold mounting nut II. Cone disc spring
12. Intake manifold-
** 13. Intake manifold gasket
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INTAKE AND EXHAUST - Turbocharger (Rear)15-21
TURBOCHARGER (REAR)
iREMOVAL AND INSTALLATION
/
id
Post-installation ODerationIl Installation of Front Exhaust Pipe(Referto P.15-31.)l Refilling of the Engine Coolant
(Refer to GROUP 00 - Maintenance
l Adjustment of Accelerator Cable1~~~~o~~ GROUP 13 - Engine
lo-13Nm7 - 9 ft.lbs.
6.
7 55-65Nmb
5 40 - 47 ft.lbs.i18Nm’
d13 ft.lbs.
MlSLA-B
0-nng
05FOOO3Removal steps
1. Battery2. Connection of accelerator cable
** 3, pg,t;eye)l * 4.
AirpipeA5. Heat protector F
6. Clutch booster vacuum hose
7. Connection of accelerator cable
(pedal side)
I)+8. Air intake hose AO+9. Air intake hose Cl * I)* 10. Oxygen sensor
11. Heat protector D12. EGR pipe
9Nmv 10 //--!
-7 ft.lbs.45 Nm33 ft.lbs.LIZ-15NmOSFOO419- 11 ft.lbs.
13.Eye boltl * 14. Oil pipe15.EGR valve16. Water pipe A
17. Water pipe B
18.Exhaust fitting
19. Heat protector E
20.Gasket21,. Turbocharger & return pipe assembly
22. Oil return pipe
l * 23. Turbocharger assembly24.Gasket25.Ring26. Exhaust fitting stayTSB Revision

17-1
EMISSIONCONTROL
.~
CATALYTIC CONVERTER............................:...Inspection
............................................................Removal and Installation
................................
CONTENTSM17.U. -
CRANKCASE EMISSION CONTROL
SYSTEM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ComponentsLocation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Crankcase Ventilation System Inspection
._..Positive Crankcase Ventilation Valve
. . . . . . . . . . . .
EVAPORATIVE EMISSION CONTROL
SYSTEM................................................................Air Conditioner Switch
....................................Air Flow Sensor, Engine Coolant
Temperature Sensor and Intake Air
Temperature Sensor
........................................Canister
............................................................Components Location
....................................
FuelFiller CapInspection................................OverfillLimiter (Two-way Valve)
....................Purge Control Solenoid Valve
........................Purge Control System Inspection
....................................................Purge Control System Inspection

............................................................Purge Control Valve
........................
PurgePort VacuumCheck................................14
14
14
6
10
10
10
6
10
10
9
7
8
9
9EXHAUST GAS RECIRCULATION
(EGR)
SYSTEM. . . . . ..____._.._........__........_____.........................Air-FuelRatio Control (MPI) System. . . . . . . .
Components Location
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .EGR Control Solenoid Valve
- Non Turbo, Turbo>. . . . . . . . . . . . . . . . . . . .EGR System Inspection
- Non Turbo, Turbo>. . . . . . . . . . . . . . . . . . . .EGR Temperature Sensor
. . . . . . . .EGR Valve - Non Turbo, Turbo>
EGR Valve Control Vacuum Check
- Non Turbo, Turbo>. . . . . . . . . . . . . . . . . . . .
SPECIFICATIONS................................................General Specifications
....................................Service Specifications
....................................
TROUBLESHOOTING. . . . . . . . . . . . . . . . . ..______...............
VACUUM HOSES................................................Inspection
............................................................Installation
........................................................VacuumHosesRouting
....................................
11
14
11
13
12
13
13
12
2
2
22

EMISSION CONTROL - Evaporative Emission Control System17-7
PURGE CONTROL SYSTEM INSPECTION M17lBBP
Barometric pressure sensor
Engine control unit
7EM0161I-----I
\7EM0140t
(1) Disconnect the vacuum hose (red stripes) from the throttle
body,and connect it to a hand vacuum pump.
(2) Plug the nipple from which the vacuum hose is discon-
nected.
(3) Under the engine conditions shown below, check by
applying vacuum from a hand vacuum pump.
When engine is cold
-engine coolant temperature:
60°C (140°F) or less
When engine is hot
-engine coolant temperature:
70°C (158°F) or higher
Engine operatingcondttionApplying vacuumResult
ldllng375 mmHg(14.8 In.Hg)Vacuum is maintalned
I
after staitingengineNOTEThe vacuum will leak con-tenuously if the altitudeis 2,200 m (7.200 ft.) or
higher, or the intake airtemperature is 50°C(I 22°F) or higher.TSB Revision

17-8EMISSION CONTROL - Evaporative Emission Control System
PURGE CONTROL SYSTEM INSPECTION M17IBBQ
Canister
Purge control
valve\
PI IrnQ rnntrnlI.1 I
kXffo~~~~r~~ ’ I I-J
relay
Barometric pressure sensor
Intake air temperature sensor
Engine coolant temperature sensor
II1 I IAir flow sensor
Engine control unit
6EM0215(1) Disconnect the purge air hose from the air intake hose, and
plug the air intake hose. Then, connect the hand vacuum
pump to the purge air hose.
(2) Under the engine conditions shown below, check by
applying vacuum from a hand vacuum pump.
When engine is cold
-engine coolant temperature:
60°C (140°F) or less
Engine operating
conditionApplying vacuumResult
Idling
375 mmHgVacuum is maintained
3,000 rpm(14.8 in.Hg)When engine is hot
-engine coolant temperature:
70°C (158°F) or higher
Engine operating
condition
Idling
3,000 rpm within
three minutes after
starting engine
3,000 rpm after
three minutes
have elapsedafter startingengine
Applying vacuum
375
mmHg(14.8 in.Hg)
Try applyingvacuum
375
mmHg(14.8 in.Hg)
Result
Vacuum is marntained
Vacuum leaks
Vacuum WIII be main-tained momentarily, after
which it will leak.
NOTEThe vacuum WIII leak con-
tinuously if the altitude
is 2,200 m
(7,200 ft.) orhrgher. or the Intake arrtemperature is 50°C(122°F) or higher.
1 TSB Revision

EMISSION CONTROL - EvaporativeEmission Control System
Purge/-----hose -----PURGE PORT VACUUM CHECK
Check Condition
17-9
M17lBKDEngine coolant temperature: 80
- 95°C (176 - 205°F)
(1) Disconnect the vacuum hose from the throttle body purge
hose nipple and connect a hand vacuum pump to the
nipple.
Ez8>
Engine speed (rprd3FU262(2) Start the engine and check to see that, after raising the
engine speed by racing the engine, vacuum remains fairly
constant.
NOTEIf there is no vacuum created, it is possible that the throttle
body port may be clogged and require cleaning.
PURGE CONTROL VALVE
INSPECTIONMl7IBCE
(1) Remove the purge control valve.
(2) Connect a hand vacuum pump to the vacuum nipple of the
purge control valve.
(3) Apply a vacuum of 400 mmHg (15.7
in.Hg.1 and check
airtightness.
(4) Blow in air lightly from the canister side nipple and check
conditions as follows.
IHand vacuum pump vacuumINormal conditionI
I0
mmHg (0 in.Hg.1Air does not blow through
(No vacuum is applied)
I ..200 mmHg (8.0 in.Hg.) or more1Air blow throughI(5) Connect a hand vacuum pump to the positive pressure
nipple of the purge control valve.
(6) Apply a vacuum of 400 mmHg (15.7
in.Hg.1 and check
airtightness.
PURGE CONTROL SOLENOID VALVE
INSPECTION
NOTEMl7lBFI
When disconnecting the vacuum hose, make an identification
mark on it so that it can be reconnected to the original position.
(I) Disconnect the vacuum hoses (non stripe and red stripe
hose) from the solenoid valve.
(2) Disconnect the harness connector from solenoid valve.
(3) Connect a hand vacuum pump to the nipple to which the
red-striped vacuum hose was connected.
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17-10EMISSION CONTROL - Evaporative Emission Control System
I-6EM13i(4) Apply a vacuum and check for airtightness when voltage
applied directly to the purge control solenoid valve and
when the voltage is discontinued.
Battery voltageResultNon-Turbo When applied
Vacuum leaks
When discontinuedVacuum is maintained
TurboWhen applied
When discontinued
Vacuum is maintained
Vacuum leaks
(5) Measure the resistance between the terminals of the
solenoid valve.
Standard value: 36
- 44 R [at 20°C (68”F)]
AIR FLOW SENSOR, ENGINE COOLANT TEMPER-ATURE SENSOR AND INTAKE AIR TEMPERA-
TURE SENSORM17lBGFTo inspect these parts, refer to GROUP 13
- MPI System
Components.
AIR CONDITIONER SWITCHMl7IBHF
To inspect the air conditioner switch, refer to GROUP 55
- Air
Conditioner Switch.
OVERFILL LIMITER (TWO-WAY VALVE)M17IBEFTo inspect the overfill limiter (two-way valve), refer to GROUP
13
- Fuel Tank.
CANISTERM17lBIFTo inspect the canister, refer to GROUP 13
- Fuel Line and
Vapor Line.
FUEL FILLER CAP INSPECTIONM17IBJBCheck the gasket of the fuel filler cap, and the filler cap itself,
for damage or deformation; replace the cap if necessary.
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17-12EMISSION CONTROL - Exhaust Gas Recirculation (EGR) System
Engine speed (rpm)1 FU44lEGR SYSTEM INSPECTION - No,
Turbo, Turbo>M171WQ
(1) Disconnect the vacuum hose (green stripe) from the EGR
valve, and connect a hand vacuum pump through the
three-way terminal.
(2) Regarding cold condition [coolant temperature:
20°C (68°F)
or less] and warm condition [coolant temperature: 70°C
(158°F) or more] of the engine, check the following two
points:

~1
Engine operationINormal state
Race the engine by
rapidly press in the
accelerator pedal.The negative pressure risesto 100 mmHg (3.9 in.Hg) ormore.(3) Disconnect the three-way terminal, and connect the hand
vacuum pump to the EGR valve.
(4) When a negative pressure of 230 mmHg (9.1
in.Hg.1 is
applied during idling, check that the engine stops or idles
unstably.
EGR VALVE CONTROL VACUUM CHECK
Ml7ICMF
Check ConditionEngine coolant temperature: 80
- 95°C (176 - 205°F)
(1) Disconnect the vacuum hose from the throttle body EGR
vacuum nipple and connect a hand vacuum pump to the
nipple.
(2) Start the engine and check to see that, after raising the
engine speed
.by racing the engine, vacuum raises pro-
portionately with the rise in engine speed.
NOTEIf there is a problem with the change in vacuum, it is
possible that the throttle body port may be clogged and
require cleaning.