ignition MITSUBISHI GALANT 1989 Service Repair Manual

00-l 6GENERAL - Precautions before Service
Caution
1. Before connecting or disconnecting the negative
cable, be sure to turn off the ignition switch and the
lighting switch.
(If this is not done,there is the possibility of
semiconductor parts being damaged.)
2.For MFI-equipped models, after completion of the
work steps [when the battery’s negative (-) termi-
nal is connected], warm up the engine and allow it
to idle for approximately five minutes under the
conditions described below, in order to stabilize
engine control conditions, and then check to be
sure that the idling is satisfactory.
Engine coolant temperature:
85-95X (185-203°F)
Lights, electric fans, accessories: OFF
Transaxle: neutral position (A/T models: “N” or
“P”)
Steering wheel:neutral (center) position
mm (tn.1
Scan Tool(Multi-use tester)
ROM pack
1
VEHICLE WASHING
If high-pressure car-washing equipment or steam car-washing
equipment is used to wash the vehicle, be sure to maintain the
spray nozzle at a distance of at least 300 mm (12 in.) from any plastic parts and all opening parts (doors, luggage compart-
ment, etc.).
SCAN TOOL (1) To operate the scan tool, refer to the “Scan Tool Operation Instructions”.
Connection and disconnection of the scan tool should
always be made with the ignition switch in the OFF
position.
(2) Always use a ROM pack that is appropriate for the vehicle.
1 ROM oack1 Aoblicable models
1 MB9913071 1989 modelsI
1 MB9913271 1990 modelsI
1 MB991359( 1991 models
IMB991 4231992 modelsI
1 MB9914661 1993 models
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00-28GENERAL - Tightening Torque/Master Troubleshooting
Taper thread tightening torque
Thread size
ITorque Nm (ftlbs.)I
r~Female thread material: Light alloy1-Female thread material: SteelI
NPTF II65-8 (3.6-5.8)
PT 1188- 12 (5.8-8.7)
PT 114, NPTF11420-30 (14-22)
PT
31840-55 (29-40)
NOTE: NPTF IS dry seat pope thread, while PT is pipe thread.
8- 12 (5.8-8.7)
16-20 (12-14)
35-45 (25-33)
60-75 (43-54)
MASTER TROUBLESHOOTING hlooKAAB
ENGINE OVERHEATS Symptom
Engine overheats Probable cause
Reference pageCoolrng system faulty14-5
Incorrect ignition timing
16-39, 40
ENGINE WILL NOT CRANK OR CRANKS SLOWLY Symptom Probable cause
Engine will not crank Starting system faulty
or cranks slowly Reference page
16-14
ENGINE WILL NOT START OR HARD TO START (CRANKS OK)
Symptom Probable cause Reference page
Engrne WIII not start or hard to
start (Cranks OK) No fuel supply to injector Injection
system problems
Ignition system problems
Vacuum leaks l Purge control valve hose
l Vacuum hoses
l intake manifold
l Intake manifold plenum
l Throttle body
l EGR valve13-90, 181, 295
13-90, 181, 295
16-32
17-3
Compression too low11-6
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GENERAL - Master Troubleshooting00-29
ROUGH IDLE OR ENGINE STALL
SymptomRough idle or engine stalls
Probable cause
Vacuum leaks l Purge control valve hose
l Vacuum hosesl Intake manifold
l Intake manifold plenum
l Throttle body
l EGR valve
Ignition system problems Idle
speed set too low Reference page or remedy
17-3
16-32
Check idle speed control sys-
tem
Idle mixture too lean or too rich
Fuel injection system problems
Exhaust gas recirculation
(EGR) system
problems Engine overheats
Compression too low
-
13-8, 119, 205
17-22
14-5
11-6
ENGINE HESITATES OR POOR ACCELERATION
Symptom
Engine hesrtates
or poor
acceleration Probable cause
Ignition system problem
Vacuum leaks
0 Purge control valve hose
l Vacuum hoses
l Intake manifold
l Intake manifold plenum
l Throttle body
l EGR valve Reference page
16-32
17-3
Air cleaner clogged
Fuel line clogged
Fuel injection system problem
Emission control system problem
l EGR system always on
Engine overheats
Compression too low-
13-8, 119, 205
17-22
14-5
11-6
ENGINE DIESELING
Probable cause Incorrect
ignition
timincc
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Symptom
Engine dieseling (runs after
ignition switch is turned off)

00-30GENERAL - Master Troubleshooting
EXCESSIVE OIL CONSUMPTION Symptom Probable cause Reference page or remedy
1
r-Excessive 011 consumption
Oil leak Repair as necessary.I Valve
stem seal worn or damaged. Repair as necessary.
Valve stem worn. Repair as necessary.
Piston ring worn or damaged. Repair as necessary.
POOR FUEL MILEAGE Symptom
Poor fuel mtleage
Probable cause
Fuel leak
Air cleaner clogged. Ignition system problems.
Fuel injection system problems.
Compression too low.
Tires improperly inflated.
Clutch slips.Brakes drag. Reference page or remedy
Repair as necessary.
-
16-32
13-8, 119, 205
1 l-6
31-3 21-4
35-l 3
NOISE
SymptomNoise Probable cause
Loose bolts and nuts.
Engine noise Reference page or remedy
Retighten as necessary.
Repair as necessary.
HARD STEERING
Symptom
Hard steering Probable cause
Reference page or remedy
Loose power steering oil pump belt
37A-21
Low fluid level Replenish
Air in power steering system
37A-22
Low tire pressure31-3
Excessive turning resistance of lower arm ball33A-11
joint Excessively tightened of steering gear box 37A-33
rack support cover
Improper front wheel alignment
Excessive turning resistance of tie-rod ball
joint
Malfunctioning electronic controlled power
steering system
Sticky flow control valve
Bent rack in steering gear box
J
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33A-5
37A-15, 33 37A-9
37A-50,
51 37A-42

11-I
CONTENTSM11AA-
ENGINE
>
........................
53
CAMSHAFT AND CAMSHAFT OIL
SEALS..........................................68
CYLINDER HEAD GASKET
.................73
ENGINE ASSEMBLY
.........................63
OIL PAN AND OIL SCREEN ...............71
SERVICE ADJUSTMENT
PROCEDURES................................
57
Basic
Idle Speed Adjustment
...........................
.
Refer to GROUP 13
Compression Pressure Check ..............
59
Curb- Idle Speed Adjustment_.___..__._____....___._....Refer to GROUP 13
Dash Pot Inspection and Adjustment 58
Drive Belts Tension Adjustment . 6
1
Engine Oil Check . . .
_. _. . . _. . . . . . . 57
Ignition Timing Adjustment
__..._.__...................Refer to GROUP 16
Lash Adjusters Check ......................
.
57
Manifold Vacuum Inspection
..............
.
60
SPECIAL TOOLS.............................56
SPECIFICATIONS
............................53
General Specifications .....................
.
53
Sealants and Adhesives ....................
56
Service Specifications......................
.
53
Torque Specifications
......................
.
54
TIMINGBELT.................................80
TROUBLESHOOTING
........................56
E,NGINE . . . . . . . . . . ..m...........2
CAMSHAFT AND CAMSHAFT OIL
SEAL. . . . . . . . . . . . . . . . . . . ..*............ . . . . . . . . . .19
CYLINDER HEAD GASKET..................25
ENGINE ASSEMBLY.........................14
OIL PAN AND OIL SCREEN. . . . . . . . . . . . . . . .23
SERVICE ADJUSTMENT
PROCEDURES. . . . . . . . . . . . . . . . . . . . . . . ..*.......7
Basic Idle Speed Adjustment
. . . . . . . .._......... . Refer to GROUP 13
Compression Pressure Check . .
.
8
Curb Idle Speed Adjustment
.__................ _. . . . Refer to GROUP 13
Drive Belts Tension Adjustment .........
.
12
Engine Oil Check
..........................
.
7
Ignition Timing Adjustment
_...___............... . . . . . Refer to GROUP 16
Lash Adjusters Check . . . . . . . . . . . .
7
Manifold Vacuum Inspection . . . . . . . . . .9
Timing Belt Tension Adjustment . . . .10
SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
.5
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
General Specifications _. _.2
Sealants and Adhesives
._ _. . . . . . . .5
Service Specifications . . . .2
Torque Specifications . . . . . . . . . . . . . . . .4
TIMING BELT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . m.. .6
Compression Too Low
Connecting Rod Noise/Main Bearing Noise Excessive Engine Rolling and Vibration
Noisy Valves
Oil Pressure Drop
Oil Pressure Too High
Timing Belt Noise

II-8ENGINE - Service Adjustment Procedures
8 VALVE
W Tlmlng belt side
il6
16
727
(3) If any abnormal noise IS not eliminated by racing, check the
lash adjuster.
@ Stop the engine.
@ Set the engine so that cylinder No. 1 is positioned at
the top dead centre of the compression.
@ Press the rocker arm at the area indicated by the+ arrow mark to check whether the rocker arm is lowered
or not.
@ Slowly turn the crankshaft 360 degrees clockwise.
@ In the same procedure as Step 0, check the rocker
arm at the area indicated by the
0 arrow mark.
@ If the rocker arm lowers easily when the part directly
above the rocker arm lash adjuster is pressed, the lash
adjuster is defective and must be replaced. When re-
placing the lash adjuster, bleed the air from all adjus-
ters and then assemble them. Then inspect with proce-
dures
@ to 0, and confirm that there are no abnormal-
ities
NOTE
lThe lash adjuster can be accurately checked for de-
fects with the leak down test.
l Refer to the engine service manual for the leak down test and lash adjuster air bleeding procedure.
If the rocker arm is extremely hard when pressed
down, the lash adjuster is normal, so look for a different
cause of abnormal sound.
COMPRESSION PRESSURE CHECK
MllFFAL
(1) Before inspection, verify that the engine oil, starter motor and battery are normal. Then, perform the following.
l Engine coolant temperature:
80- 95°C
(176- 203°F)
l Lights, electric cooling fan and accessories: OFF
l Transaxle:
P range
0 Steering wheel: Neutral position
(2) Disconnect the spark plug cable.
(3) Remove all the spark plugs
(4) Disconnect the connector of the distributor.
NOTE
This will prevent the engine control module from controll- ing the ignition and fuel injection.
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II-IOENGINE - Service Adjustment Procedures
(3) Remove the PCV hose from the PCV valve and attach a
vacuum gauge.
(4) Check that the negative pressure at the intake manifold
during idle revolution is normal.
Standard value:
(8 VALVE>Approx. 500 mmHg (20 in.Hg)
<16VALVE>Approx. 510 mmHg (20 in.Hg)
(5) If outside the standard value, isolate the cause by referring
to the following table and repair the fault.
Symptom
CauseRemed
y
l The vacuum gauge reading is less than l Ignition timing is retarded.l Adjust the ignition timing.
standard value, but the pointer is
stable.
l The vacuum gauge pointer swings l The gas mixture is excessivelyl Check
Multiport Fuel Injection
slowly.rich.system.
l The vacuum gauge pointer drops irre-
l The gas mixture is excessively
l Check
Multiport Fuel Injectiongularly.lean.system.
l The vacuum gauge pointer drops inter-
0 Incomplete close contact of in-0 Check and repair the valve.mittently to 30 to 160
mmHg
(1.2 to take and exhaust valve seats.
6.3 in.Hg).
l The vacuum gauge pointer drops sud-l Broken cylinder head gasketl ,Replace cylinder head gasket. denly
from the normal reading to 250 mmHg
(9.8 in.Hg). then returns to
normal.
/ OlR0175
condition.
Timina mark
‘timing mark._*-
Camshaft sprocket TIMING BELT TENSION ADJUSTMENT
(8 VALVE>MllFGCEa
There are 2 access holes in the timing belt front lower cover.
These can be used to readjust the tension of the timing belt by
the following procedure without removing the timing belt front lower cover. However, timing belt “B”, which drives the right
silent shaft, cannot be adjusted unless the cover is removed. (1) Turn the steering wheel all the way to the left.
(2) Remove the left side undercover panel.
NOTE
This work is done so that the crankshaft can be turned.
(3) Place a piece of wood against the engine oil pan and jac
k
up.(4) Remove the engine mounting bracket.
(5) Remove the timging belt front upper cover.
(6) Remove the four spark plugs.
(7) Turn the crankshaft clockwise and check the timing belt
(8) Turn the crankshaft clockwise and align the timing marks.
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ENGINE - Engine Assembly11-15
35-4

5
25-33 35-45 Nm
25-33
ft.lbs.
24
35-45 N
m
25-33
ft.lbs.
23-2
7
250166309
I23
:l;nbs.
50-65 Nm
36-47 ft.lbs.
dv--iu wm: ’22-29 ft.lbs. \ d.(,(I3L i‘9
50-65 Nm*Cb36-47 ft.lbs.* -
Removal steps
1. Connection for accelerator cable(Refer to GROUP
13-Service Adjustment
Procedures.)
2. Connection for heater hose
3. Connection for brake booster vacuum
hose
4. Connection for fuel high pressure hose 5. O-ring
6. Connection for fuel return hose
7. Connection for vacuum hose
8. Connection for oxygen sensor
9. Connection for engine coolant temperature gauge unit
10. Connection for engine coolant
temperature sensor
11. Connection for
ISC12. Connection for injector13. Connection for EGR temperature sensor (California vehicles only)
14. Connection for ignition power transistor
15. Connection for condenser
16. Connection for TPS
17. Connection for idle speed control motor
position sensor
18. Connection for distributor
30-40 Nm
\22-29 ft.lbs.
bO-50 Nm29- 36 ft.lbs.
19. Connection for crankshaft position sensor
20. Connection for ground cable
21. Control wiring harness
22. Connection for generator
23. Connection for oil pressure switch
dae I)* 24. Power steering oil pump 27. Gasket
28. Clamp of pressure hose (Power steering) and high pressure hose (Air conditioning)
29. Engine mount bracket
30. Self locking nut
,** *+ 31. Engine assembly
IdOTEf-or tightening locations indicated by the * symbol. firsttighten temporarily, and then make the final tightenrng wrth?he entire werght of the engine applied to the vehicle body.
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ENGINE - Camshaft and Camshaft Oil SealII-19
CAMSHAFT AND CAMSHAFT OIL SEAL <8
VALVE>MllZA-A
REMOVAL AND INSTALLATION
v--
5-7 Nm
4-5 ft.lbs.
0
0 I‘
‘p4
Sealant:
3M ATD Part No. 8660
or eauivalent 20-27
Nm 14-20
ftlbs.
80-100
Nm
58-72
ftlbs.
Romnval ztrms. . . . . . ..P-w.---r-1. Connection for spark plug cables
and hioh
tension cable 3
nictrihl ,+r-,rL. U,illl lYUI”l
(Refer
to GROUP 16-Ignition System.)
3. timing belt
(Refer to P.l I-34.)4. Connection for breather hose
5. Connection for P.C.V. hose6. Accelerator cable bracket
7. Rocker cover
8. Semi-circular packing
9 Camshaft sorocket01A0316 _.
__... -..- -rLL IO Oil sea
l
+e s< ii: Rocker arm and shaft assembly,+ 12. Camshaft
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Cyl1n&r’ ;;(oozhead
Sealant: 3M
ATD Part No.8660
or equivalent 5-7
Nm4-5 ft.lbs 90-100

Nm65-72 ftlbs.
40-50 Nm /29 - 36 ft.lbs.
30-40 Nm22- 29
ftlbs.
Removal steps
I. Air intake hose
2. Connection for accelerator cable or
throttle cable (Refer to GROUP
13-Service Adjustment Procedures.)+e +a 3. Connection for fuel high pressure hos
e
4. O-ring
+e l + 5. Connection for radiator upper hose
6. Connection for water by-pass hose
7. Connection for heater hose
8. Connection for brake booster vacuum
hose
9.
Connectron for fuel return hos
e
10. Connection for vacuum hose 11. P.C.V. hose
12. Connection for spark plug cable
13. Connection for oxygen sensor
14. Connection for engine coolant temperature gauge unit
15. Connection for engine coolant
temperature sensor
16. Connection for
ISC17. Connection for injector
olAo314
l *
18. Connection for EGR temperature sensor (California vehicles only)
19. Connection for ignition power transistor
20. Connection for condenser
21. Connection for TPS
22. Connection for
ISC motor position sensor
23. Connection for distributor
24. Connection for crankshaft position sensor
25. Connection for ground cable
26. Control wiring harness
27. Clamp for pressure hose (Power steering)and high pressure hose (Air conditioning)
28. Engine mounting bracket
29. Rocker cover
30. Semi-circular packing
31. Timing belt front upper cover
32. Camshaft sprocket 33. Self-locking nuts
34. Gasket
+e ++ 35. Cylinder head assembl
y
l + 36. Cylinder head gasket
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