ad blue MITSUBISHI 3000GT 1991 Service Manual

11-36ENGINE - Cylinder Head and Valve
SquarenssVALVE SPRINGS
(1) Check free length of each valve spring and replace if
necessary.
!
FreelengthStandard value: 46.9 mm
(1.846 in.)\bJLimit: 45.9 mm
(1.807 in.)
(2) Using a square, test squareness of each valve spring. If
spring is excessively out of square, replace it.
Standard value: Less than 2”
Limit: 4
1 EN035
VALVE GUIDES
1 EN29ECheck the valve stem-to-guide clearance. If the clearance
exceeds the service limit, replace the valve guide with new
oversize part.
Standard value:
Intake
Exhaust0.02 - 0.05 mm (0008 - .0020 in.)
Limit:0.05
- 0.09 mm (.0020 - .0035 in.)
Intake
Exhaust0.10 mm (0039 in.)
0.12 mm (0047
in.)6EN043
1AVALVE SEAT RECONDITIONING PROCEDURES
(I 1 Before valve seat reconditioning, check valve stem to guide
clearance.
(2)Recondition the valve seat with a seat grinder or cutter. The
valve seat width should be the specified value at the center
of the valve face.
Inspect the valve seat with prussian blue to determine
LJwhere the valve contacts the seat. To do this, coat valve
seat lightly with prussian blue, and then set valve in place.
Rotate the valve with light pressure. If the blue is
transferred to the center of valve face, contact is satisfac-
tory.
If the blue is transferred to top edge of the valve face, lower
valve seat with a 30 degrees stone or cutter. If the blue is
transferred to the bottom edge of valve face, raise valve
seat with a 65 degrees stone or cutter.
Valve seat diameter:
Intake34 mm (I .34 in.)
ExhaustSeat width: 0.9
29.5 mm (1.16 in.)
- 1.3 mm (035 - .051 in.)
(3) The valve and valve seat should be lapped with a lapping
compound.
VALVE SEAT REPLACEMENT PROCEDURE
(1) Grind the valve seat to be replaced from the inside to thin
the wall thickness. Then, remove the valve seat.
1 ENOE18
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SERVICE ADJUSTMENT PROCEDURES
MlBFHSU
BASIC IDLE SPEED ADJUSTMENT
NOTE(1) The basic idle speed has been factory-adjusted with the
speed adjusting screw (SAS) and does not normally require
adjustment.(2) If the adjustment is required, first check that the ignition
plug, injector,
ISC servo, and compression pressure are
normal.
(1) Before starting the inspection and adjustment procedures,set the vehicle in the following conditions:
l
Engine coolant temperature: 80 to 95°C (176 to 205°F)l Lights, electric cooling fan, accessories: OFF
lTransaxle: Neutral (P range on vehicles with automatic
transaxle)l Steering wheel: Straightforward position
(2) When using the multi-use tester, connect it to the diagnosis
connector.
NOTEThe connection of the multi-use tester grounds the
self-
diagnosis/data transmission selector terminal.
(3) When not using the multi-use tester, proceed as follows:
@) Insert a paper clip into the l-pin blue connector as
shown in the illustration. FUEL SYSTEM
- Service Adjustment Procedurks13-31
i
@ Connect a primary-voltage-detecting tachometer to the
paper clip.
NOTEThe
tacho/neter should read l/3 of the actual engine
speed. This means that the actual engine speed is thetachometer reading multiplied by 3.
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13-100FUEL SYSTEM - 0
n-vehicleInspection of MPI Components
SENSOR INSPECTION
(1) Disconnect the oxygen sensor (rear) connector and connect
the special tool, Test Harness, to the oxygen sensor (rear)
connector.
MD998464
7FUO339
e
MD9584647FUO340(2) Check that there is continuity [approx. 20
R at 20°C (68”F)Iacross terminals @ and @ of the oxygen sensor (rear)
connector.
(3) If there is no continuity, replace the oxygen sensor (rear).
(4) Warm up the engine until the engine coolant temperature
becomes 80°C (176°F) or higher.
(5) Using jumper wires, connect terminals @ (red clip of the
special tool) and @ (blue clip) of the oxygen sensor
connector to battery
0 and 0 terminals respectively.
Caution
Ensure that the jumper wires are connected correctly,
as wrong connections result in a broken oxygen sensor.
(6)Connect a digital voltmeter across terminals @ (black clip of
(7)the special tool) and @ (white clip).
Race the engine repeatedly and measure the output voltage
of the oxygen sensor (rear).
EngineOxygen sensor
output voltageRemarks
When engineis raced0.6-l.OVWhen the air-fuel mixturebecomes richer as a result
of repeated racing, the
oxygen sensor should outputa voltage of 0.6 - 1 .O V.
(8) If the measurements are not as specified, defective oxygen
sensor (rear) is suspected.
(9) Check the oxygen sensor (front) in the same way by
following steps
(I) through (8).
INSTALLATION
(1) For removal and installation of oxygen sensor, refer to
GROUP 15
- Exhaust Manifold.
(2) Tighten the oxygen sensor to specified torque.
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idFUEL SYSTEM
- On-vehicle Inspection of MPI Components13-113
‘El
‘a
~
63
7FUOOlO(stepper motor)
7FUO98CIdle speed
MD998463
7FUOO78
Checking the Coil Resistance(1) Disconnect the idle speed control servo connector and
connect the special tool (test harness).
(2) Measure the resistance between terminal @ (white clip of
the special tool) and either terminal @ (red clip) or terminal@ (blue clip) of the connector at the idle speed control
servo side.
Standard value: 28
- 33 !2 at 20°C (68°F)
(3) Measure the resistance between terminal @ (green clip of
the special tool) and either terminal @ (yellow clip) or
terminal @ (black clip) of the connector at the idle speed
control servo side.
Standard value: 28
- 33 CR at 20°C (68°F)
Operational Check(1) Remove the throttle body.
(2) Remove the stepper motor.
(3) Connect the special tool (test harness) to the idle speed
control servo connector.
(4) Connect the positive
0 terminal of a power supply (approx
6 V) to the white clip and the green clip.
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13-114FUEL SYSTEM - On-vehicle Inspection of MPI Components
(5) With the idle speed control servo as shown in the
illustration, connect the negative
0 terminal of the power
supply to each clip as described in the following steps, and
check whether or not a vibrating feeling (a feeling of very
(slight vibration of the stepper motor) is generated as aJresult of the activation of the stepper motor.@Connect the negative
0 terminal of the power supply to
the red and black clip.@Connect the negative
0 terminal of the power supply to
the blue and black clip.@Connect the negative
0 terminal of the power supply to@the blue and yellow clip.
Connect the negative
0 terminal of the power supply to
the red and yellow clip.@Connect the negative
0 terminal of the power supply to
the red and black clip.@ Repeat the tests in sequence from @ to
0.(6) If, as a result of these tests, vibration is detected, the
stepper motor can be considered to be normal.
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FUEL SYSTEM - On-vehicle Inspection of MPI Components13-125
ACTUATOR INSPECTION
Operation Check
NOTEBefore disconnecting the vacuum hose, mark it to ensure
reconnection at the correct position.
(1) Remove the vacuum hose (blue stripe on black) from the
solenoid valve.
(2) Disconnect the harness connector.
(3) Apply a negative pressure to the nipple to which the black
vacuum hose has been connected and check air-tightness
with and without the battery voltage applied to the solenoid
valve terminal.
BatteryvoltageThe other nipple
of solenoid valveNormal state
Not applied
qj
I
AppliedOpenNegative pressure isheld
Coil Resistance Check
(I) Measure the coil resistance with a circuit tester.
Standard value: 36
- 46 R [at 20°C (68”F)]
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EMISSION CONTROL - Vacuum Hoses
VACUUM 1-10sEs
lVACUUM HOSES ROUTING
L//
17-3M17JA-
-
I’
Li
Fuel pressureregulator
Vehicle front
id
L: Light blueR: RedB: Black
7EM0131
EGR controlsolenoid valve
r-c,cud valve/
Canister
/Fuel pressureregulator
v
Vehicle frontG: GreenY: Yellow
L: Light blueR: RedB: Black
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7EM0132I
1

17-4EMISSION CONTROL - Vacuum Hoses
Fuel pressure control
solenoid valveEGR controlWaste gate control
solenoid valve
solenoid valve
/\,i
aste gate actuator
G: GreenY: Yellow
L: Light blueR: RedB: BlackW:White
Purge controlsolenoid valve
Bypass valve
/Fuel pressure regulator
Purge control valve
Waste gate actuator
TLrbocharger7EM0133
INSPECTIONM17JCAF +’
(1) Referring to the VACUUM HOSES ROUTING, confirm that
the vacuum hoses are properly connected.
(2) Check the hoses for irregularities (disconnection, loose-
ness, etc.) and confirm that there is no breakage or
damage.
INSTALLATIONM17JDAF(1) When connecting a hose, firmly press it onto the nipple.
(2) Referring to the VACUUM HOSES ROUTING, connect the
hoses correctly.
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22-4MANUAL TRANSAXLE - Specifications/ - ,
Part name
Spacer
(For adjustment of input shaft end play)
Snap ring
(For adjustment of intermediate gear front bearingend play)
Spacer:Foradjustmentofintermediategearpreload)Thickness mm (in.)
IdentificationsymbolPart No.
0.95 l.0374)
95
MD7209410.98
t.0386)98MD720942
1
.Ol t.0398)01M D720943
0.04 (.0409)04MD7209441.07(.0421)
07MD7209451.10(.0433)
JMD71 04541.13 l.0445)
DMD7002701.16 i.0457)
KMD7104551.19
(.0468)LMD710456l.ZZ(O.480)
GMD7002711.25 i.0492)
MMD7104571.28
t.0504)NMD7104581.31
(.0516)EMD7065741.34(.0527)0
M D7 104591.37
(.0539)PMD71 04601.40(.0551)
-MD7065731.43
t.0563)QMD710461
1.46l.0575)RMD7104621.4 l.0551)
NoneMD703779
1.5 l.0591)
BrownMD7037801.6
f.0630)BlueMD7037810.80
t.0315)80MD7241 420.83 l.0327)
83MD7241 43
0.86f.0338)86MD7241440.89
t.0350)89MD7241 450.92 f.0362)
92MD7241 460.95 l.0374)
95MD7241470.98 i.0386)
98MD7241 48
1 .Ol t.0398)01MD724149
1.04 (.0409)04MD7241501.07(.0421)
07MD7241 51
1 .I0 (.0433)10MD7241521.13 f.0445)
13MD7241531.16
t.0457)16MD7241 541.19
(.0468)19MD724155
1.22 (.0480)22MD7241 561.25 t.0492)25
MD7241571.28 f.0504)
28MD7241581.31 l.0516)
31MD7241 591.34(.0527)
34MD7241 601.37
(.0539)37MD724161
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23-14AUTOMATIC TRANSAXLE - SpecificationsPart name
Pressureplate
(for adjustment of low-reverse brake end play)
Spacer
(for adjustment of differential case preload)
Snap ringfor adjustment of output flange bearing end play)Thickness mm (in.)Identification
symbolPart No.
5.9
l.232)A
MD731 736
6.0
f.236)0MD731 737
6.1
i.240)1MD731738
6.2
(.244)2MD731 739
6.3
(.248)3MD731 740
6.4
(.252)4MD731 588
6.5
(.256)5MD731 741
6.6
(.260)6MD731742
6.7
(.264)7MD731 743
6.8
(.268)8MD731744
6.9
l.272)9MD731 745
0.83
(.0327)83MD720937
0.86
l.0339)86MD720938
0.89
t.0350)89MD720939
0.92
t.0362)92MD720940
0.95
f.0374)95MD720941
0.98
t.0386)98MD720942
1
.Ol f.0398)01MD720943
1.04 l.0409)04MD7209441.07
(.0421)07MD720945
I. 10 f.0433)JMD710454
1.13
f.0445)DMD700270
1.16(.0457)KMD710455
1.19
l.0469)LMD710456
1.22
(.0480)GMD700271
1.25
(.0492)MMD710457
1.28
i.0504)NMD71 0458
1.31
(.0516)EMD706574
1.34
l.0528)0MD710459
1.37
f.0539)PMD710460
1.76
t.0693)BrownMD73331 4
1.82
(.0717)NoneMD722538
1.88
i.0740)BlueMD721 014
1.94
(.0764)BrownMD721015
2.00
t.0787)NoneMD721016
2.06
(.0811)BlueMD721017
2.12
l.0835)BrownMD722539
2.18
t.0858)NoneMD73331 5
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