check engine MITSUBISHI MONTERO 1998 Owner's Guide
[x] Cancel search | Manufacturer: MITSUBISHI, Model Year: 1998, Model line: MONTERO, Model: MITSUBISHI MONTERO 1998Pages: 1501, PDF Size: 25.81 MB
Page 261 of 1501
release bearing with solvent. Apply a light coat of multipurpose
grease to release bearing sliding surface. Apply a very light coating
of grease to input shaft splines. DO NOT allow grease or dirt on
clutch disc or pressure plate surfaces.
3) To install remaining components, reverse removal
procedure. Refill all fluids to proper levels. Adjust all control
cables, clutch pedal height and free play. See CLUTCH PEDAL HEIGHT and
CLUTCH PEDAL FREE PLAY under ADJUSTMENTS. See Fig. 1.
Removal (4WD Models)
1) Remove switch panel from rear console. Remove suspension
control switch or hole cover. Disconnect rear console harness
connector. Remove side panel. Remove rear console assembly. Remove
shift lever knob(s). Remove floor console harness connector. Remove
front console assembly.
2) Move transmission lever to Neutral position and transfer
lever to 4H (4WD high range) position. Remove control lever boot
retainer and boot. Remove transmission and transfer control lever
assemblies. Remove control lever bushing (transmission), gaskets and
stopper plates.
3) Raise and support vehicle. Remove skid plate and front
exhaust pipe. Drain transmission and transfer case fluid. Index mark
front and rear drive shaft flanges. Remove front and rear drive
shafts.
4) Remove drive shaft dust seals. Disconnect HI/LO and
2WD/4WD detection switch connectors. Disconnect back-up light switch
connector. Disconnect center differential lock detection switch
connector. Disconnect center differential lock operation switch
connector. Disconnect 4WD operation detection switch.
5) Disconnect speedometer cable. Remove clutch slave cylinder
heat shield. Remove clutch slave cylinder (without disconnecting
hydraulic line) and wire aside. Remove starter and starter cover.
Remove heat shield, both transmission stays and bellhousing lower
cover.
6) Support transmission with transmission jack. Remove
transfer case roll stopper and bracket. Remove crossmember and engine
mounting rear insulator. Remove transfer case protector bracket and
mass damper. Remove remaining bellhousing bolts. Pull toward rear of
vehicle to free transmission input shaft from clutch. Lower
transmission/transfer assembly from vehicle.
7) If reusing pressure plate, mark pressure plate to flywheel
for installation reference. Insert a clutch alignment tool to prevent
pressure plate and clutch disc from dropping. Loosen pressure plate
bolts gradually in a crisscross pattern to avoid warping pressure
plate flange during removal. Remove pressure plate and clutch disc.
See Fig. 3 .
Fig. 3: Removing & Installing Clutch On Flywheel (Typical)
Courtesy of Mitsubishi Motor Sales of America.
Inspection
1) Check release bearing and release fork for damage or wear.
Page 279 of 1501
Repair or replace components as necessary. If no problems exist, go to
next step.
2) Ground fan motor 3-pin connector terminal No. 3 (Black
wire). Using a fused jumper wire, connect battery voltage to 3-pin
connector terminal No. 2 (Blue wire). See WIRING DIAGRAMS. Fan motor
should operate with no abnormal noises or interferences. Repair or
replace components as necessary.
Engine Coolant Temperature (ECT) Sensor
Remove ECT sensor from vehicle. Suspend sensor in water so
that sensor does not touch container. Slowly heat water. Using an
ohmmeter, check sensor continuity as temperature increases. Replace
ECT sensor if resistance is not as specified. See
ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE table.
ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE
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Temperature F (C) Ohms
Diamante, Eclipse 2.0L Turbo & 2.4L
32 (0) ................................................. 5100-6500\
68 (20) ................................................ 2100-2700\
104 (40) ................................................ 900-1300\
176 (80) ................................................. 260-360\
Eclipse Non-Turbo
77 (25) ................................................. 900-1100\
212 (100) ................................................ 600-800\
Galant & Mirage
68 (20) ................................................ 2100-2700\
176 (80) ................................................. 260-360\
Montero
68 (20) ................................................ 2130-2610\
176 (80) ................................................. 258-322\
Montero Sport
68 (20) ................................................ 2100-2700\
176 (80) ................................................. 260-360\
3000GT
32 (0) ...................................................... 5800\
68 (20) ..................................................... 2400\
104 (40) .................................................... 1100\
176 (80) ..................................................... 300\
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Electric Cooling Fan Relay (Diamante, Eclipse, Galant &
Mirage)
1) Remove radiator fan motor relay from relay box located at
right side of engine compartment. Check for continuity between relay
terminals No. 1 and 3. If continuity exists, go to next step. If
continuity does not exist, replace cooling fan relay. See Fig. 8.
2) Using a fused jumper wire, connect battery voltage to
cooling fan relay terminal No. 1. Using another jumper wire, connect
cooling fan relay terminal No. 3 to battery ground. With cooling fan
relay energized, there should be continuity between cooling fan relay
terminals No. 4 and 5. With cooling fan relay not energized, there
should be no continuity between terminals No. 4 and 5. If continuity
does not exist as specified, replace cooling fan relay. See Fig. 8.
Electric Cooling Fan Relay (Montero, Montero Sport & 3000GT)
1)Remove relay from relay box in engine compartment relay
box. Check for continuity between relay terminals No. 2 and 4. If
continuity exists, go to next step. If continuity does not exist,
replace cooling fan relay. See Fig. 9.
2) Using a fused jumper wire, connect battery voltage to
Page 282 of 1501
speed, coolant temperature and A/C operation request, PCM
will command low, medium or high speed fan operation.
Diamante
1) If only the radiator fan does not operate, check fusible
link No. 6 located in engine compartment relay box. If only the
condenser fan does not operate, check dedicated fuse No. 16 (20-amp)
located in engine compartment relay box. See WIRING DIAGRAMS. Repair
as necessary.
2) If radiator fan and condenser fan operate in all speeds
except low, check appropriate low speed relay. See COMPONENT TESTS.
See WIRING DIAGRAMS . If low speed relay is okay, check PCM. See
appropriate G - TESTS W/CODES article in ENGINE PERFORMANCE.
* G - TESTS W/CODES - 1997
* G - TESTS W/CODES - 1998
3) If radiator fan and condenser fan operate in all speeds
except high, check appropriate high speed relay. See COMPONENT TESTS.
See WIRING DIAGRAMS . If high speed relay is okay, check PCM. See
appropriate G - TESTS W/CODES article in ENGINE PERFORMANCE.
* G - TESTS W/CODES - 1997
* G - TESTS W/CODES - 1998
4) To confirm radiator fan or condenser fan operation, see
FAN OPERATING MODE (DIAMANTE) table. If fan operation is not as
specified, check wiring harness for opens or shorts. Repair as
necessary.
FAN OPERATING MODE (DIAMANTE) ( 1)
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Power Circuit
Coolant Operating Radiator Condenser
Temp.
F (C) Low/High Fan Speed Fan Speed
13 MPH ( 2)
221 (105) ( 2) ........ On/Off ....... Low ................ Low
221 (105) ( 3) ........ Off/On ....... Mid ................ Mid
239 (115) ( 3) ........ On/On ........ High .............. High
13 MPH ( 3)
221 (105) ( 2) ........ On/Off ....... Low ................ Low
221 (105) ( 2) ........ On/On ........ High .............. High
30 MPH ( 2)
203 (95) ( 2) ........ Off/Off ....... Off ................ Off
203 (95) ( 3) ......... On/Off ....... Low ................ Off
221 (105) ( 3) ........ Off/On ....... Mid ................ Mid
30 MPH ( 3)
194 (90) ( 2) ........ Off/Off ....... Off ................ Off
194 (90) ( 3) ......... On/Off ....... Low ................ Off
221 (105) ( 3) ........ On/On ........ High ............... Mid
50 MPH ( 3)
221 (105) ( 2) ....... Off/Off ....... Off ................ Off
221 (105) ( 3) ........ On/On ........ High ............... Mid
( 1) - A/C request switch is turned off.
( 2) - Approximate vehicle speed/coolant temperature or less.
( 3) - Approximate vehicle speed/coolant temperature or more.
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NOTE: Operation of radiator and condenser fans is controlled by
vehicle Powertrain Control Module (PCM). Based on vehicle
speed, coolant temperature and A/C operation request, PCM
Page 283 of 1501
will command low, medium or high speed fan operation.
Eclipse
1) If only the radiator fan does not operate, check fusible
link No. 7 (20-amp) located in engine compartment relay box. If only
the condenser fan does not operate, check dedicated fuse No. 9 (20-
amp) located in engine compartment relay box. See WIRING DIAGRAMS.
Repair as necessary.
2) If radiator fan and condenser fan operate in all speeds
except low, check appropriate low speed relay. See COMPONENT TESTS.
See WIRING DIAGRAMS . If low speed relay is okay, check PCM. See
appropriate G - TESTS W/CODES article in ENGINE PERFORMANCE.
* G - TESTS W/CODES - 2.0L NON-TURBO - 1997
* G - TESTS W/CODES - 2.0L TURBO - 1997
* G - TESTS W/CODES - 2.4L - 1997
* G - TESTS W/CODES - 2.0L NON-TURBO - 1998
* G - TESTS W/CODES - 2.0L TURBO & 2.4L - 1998
3) If radiator fan and condenser fan operate in all speeds
except high, check appropriate high speed relay. See COMPONENT TESTS.
See WIRING DIAGRAMS . If high speed relay is okay, check PCM. See
appropriate G - TESTS W/CODES article in ENGINE PERFORMANCE.
* G - TESTS W/CODES - 2.0L NON-TURBO - 1997
* G - TESTS W/CODES - 2.0L TURBO - 1997
* G - TESTS W/CODES - 2.4L - 1997
* G - TESTS W/CODES - 2.0L NON-TURBO - 1998
* G - TESTS W/CODES - 2.0L TURBO & 2.4L - 1998
4) To confirm radiator fan or condenser fan operation, see
FAN OPERATING MODE (ECLIPSE NON-TURBO) or FAN OPERATING MODE (ECLIPSE\
2.0L TURBO & 2.4L) table. If fan operation is not as specified, check
wiring harness for opens or shorts. Repair as necessary.
FAN OPERATING MODE (ECLIPSE NON-TURBO)
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With A/T With M/T
Coolant Radiator Radiator Condenser
Temp.
F (C) Fan Speed Fan Speed Fan Speed
28 MPH ( 1) ( 2)
203 (95) ( 2) .......... Off ......... Off ................ Off
203-210 (95-99) ....... Mid ......... High ............... Off\
210 (99) ( 3) .......... High ........ High ............... Mid
28-50 MPH ( 1)
194 (90) ( 2) .......... Off ......... Off ................ Off
194-210 (90-99) ....... Mid ......... High ............... Off\
210 (99) ( 3) .......... High ........ High ............... Mid
50 MPH ( 1) ( 3)
210 (99) ( 2) .......... Off ......... Off ................ Mid
210 (99) ( 3) .......... High ........ High ............... Off
12 MPH ( 2) ( 4)
210 (99) ( 2) .......... Mid ......... High ............... Mid
210-242 (99-117) ...... High ........ High .............. High\
242 (117) ( 3) ......... High ........ High .............. High
12-50 MPH ( 4)
210 (99) ( 2) .......... Mid ......... High ............... Mid
210-242 (99-117) ...... High ........ High .............. High\
242 (117) ( 3) ......... High ........ High .............. High
50 MPH ( 3) ( 4)
210 (99) ( 2) .......... Mid ......... High ............... Mid
210-242 (99-117) ( 3) .. High ........ High .............. High
Page 284 of 1501
242 (117) (3) ......... High ........ High .............. High
( 1) - A/C request switch is turned off.
( 2) - Approximate vehicle speed/coolant temperature or less.
( 3) - Approximate vehicle speed/coolant temperature or more.
( 4) - A/C request switch is turned on.
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FAN OPERATING MODE (ECLIPSE 2.0L TURBO & 2.4L) \
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With A/T With M/T
Coolant Radiator Radiator Condenser
Temp.
F (C) Fan Speed Fan Speed Fan Speed
28 MPH ( 1) ( 2)
203 (95) ( 2) .......... Off ......... Off ................ Off
203-210 (95-99) ....... Low ......... Mid ................ Off\
210 (99) ( 3) .......... High ........ High ............... Mid
28-50 MPH ( 1)
194 (90) ( 2) .......... Off ......... Off ................ Off
194-210 (90-99) ....... Low ......... Mid ................ Off\
210 (99) ( 3) .......... High ........ High ............... Mid
50 MPH ( 1) ( 3)
210 (99) ( 2) .......... Off ......... Off ................ Off
210 (99) ( 3) .......... High ........ High ............... Mid
12 MPH ( 2) ( 4)
210 (99) ( 2) .......... Low ......... Mid ................ Mid
210-242 (99-117) ...... High ........ High .............. High\
242 (117) ( 3) ......... High ........ High .............. High
12-50 MPH ( 4)
210 (99) ( 2) .......... Low ......... Mid ................ Mid
210-242 (99-117) ...... High ........ High .............. High\
242 (117) ( 3) ......... High ........ High .............. High
50 MPH ( 3) ( 4)
210 (99) ( 2) .......... Low ......... Mid ................ Mid
210-242 (99-117) ( 3) .. High ........ High .............. High
242 (117) ( 3) ......... High ........ High .............. High
( 1) - A/C request switch is turned off.
( 2) - Approximate vehicle speed/coolant temperature or less.
( 3) - Approximate vehicle speed/coolant temperature or more.
( 4) - A/C request switch is turned on.
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NOTE: Operation of radiator and condenser fans is controlled by
vehicle Powertrain Control Module (PCM). Based on vehicle
speed, coolant temperature and A/C operation request, PCM
will command low, medium or high speed fan operation.
Galant
1) If only the radiator fan does not operate, check fusible
link No. 5 (30-amp) located in engine compartment relay box. If only
the condenser fan does not operate, check dedicated fuse No. 3 (30-
amp) located in engine compartment relay box. See WIRING DIAGRAMS.
Repair as necessary.
2) If radiator fan and condenser fan operate in all speeds
except low, check appropriate low speed relay. See COMPONENT TESTS.
See WIRING DIAGRAMS . If low speed relay is okay, check PCM. See
appropriate G - TESTS W/CODES article in ENGINE PERFORMANCE.
* G - TESTS W/CODES - 1997
* G - TESTS W/CODES - 1998
Page 285 of 1501
3) If radiator fan and condenser fan operate in all speeds
except high, check appropriate high speed relay. See COMPONENT TESTS.
See WIRING DIAGRAMS . If high speed relay is okay, check PCM. See
appropriate G - TESTS W/CODES article in ENGINE PERFORMANCE.
* G - TESTS W/CODES - 1997
* G - TESTS W/CODES - 1998
4) To confirm radiator fan or condenser fan operation, see
appropriate FAN OPERATING MODE (GALANT) table. If fan operation is not\
as specified, check wiring harness for opens or shorts. Repair as
necessary.
FAN OPERATING MODE (GALANT) ( 1)
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Coolant Radiator Condenser
Temp. F (C) Fan Speed Fan Speed
28 MPH ( 2)
203 (95) ( 2) ................ Off .......................... Off
203-221 (95-105) ............ Low .......................... Low\
221 (105) ( 3) .............. High ......................... High
28-50 MPH
194 (90) ( 2) ................ Off .......................... Off
194-221 (90-105) ............ Low .......................... Low\
221 (105) ( 3) .............. High ......................... High
50 MPH ( 3)
221 (105) ( 2) ............... Off .......................... Off
221 (105) ( 3) .............. High ......................... High
Any Speed ( 4)
221 (105) ( 2) ............... Low .......................... Low
221 (105) ( 3) .............. High ......................... High
( 1) - A/C request switch is turned off.
( 2) - Approximate vehicle speed/coolant temperature or less.
( 3) - Approximate vehicle speed/coolant temperature or more.
( 4) - A/C request switch is turned on.
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NOTE: Operation of radiator and condenser fans is controlled by
vehicle Powertrain Control Module (PCM). Based on vehicle
speed, coolant temperature and A/C operation request, PCM
will command low, medium or high speed fan operation.
Mirage
1) If only the radiator fan does not operate, check fusible
link No. 5 (30-amp) located in engine compartment relay box. If only
the condenser fan does not operate, check fusible link No. 2 (100-amp)\
and dedicated fuse No. 1 (25-amp) located in engine compartment relay
box. See WIRING DIAGRAMS . Repair as necessary.
2) If fusible links and dedicated fuse are okay, check
appropriate fan relay and/or fan motor for proper operation. See
COMPONENT TESTS. See WIRING DIAGRAMS. If fan relay and motor are okay,
check PCM. See appropriate G - TESTS W/CODES article in ENGINE
PERFORMANCE.
* G - TESTS W/CODES - 1.5L - 1997
* G - TESTS W/CODES - 1.8L - 1997
* G - TESTS W/CODES - 1998
3) To confirm radiator fan or condenser fan operation, see
appropriate FAN OPERATING MODE (MIRAGE) table. If fan operation is not\
as specified, check wiring harness for opens or shorts. Repair as
Page 286 of 1501
![MITSUBISHI MONTERO 1998 Owners Guide necessary.
FAN OPERATING MODE (MIRAGE)
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FAN OPERATING MODE (MIRAGE)
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necessary.
FAN OPERATING MODE (MIRAGE)
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Power Circuit
Coolant Operating Radiator Condenser
Temp.
F (C) RAD/COND Fan Speed Fan Speed
203 (95) ( 1) ( 2) ...... Off/Off ....... Off ................ Off
203-221 (95-105) ( 1) ... On/Off ........ On ................ Off
221 (105) ( 1) ( 3) ...... On/On ......... On ................. On
All Temp. ( 4) .......... On/On ......... On ................. On
( 1) - A/C request switch is turned off.
( 2) - Approximate coolant temperature or less.
( 3) - Approximate coolant temperature or more.
( 4) - A/C request switch is turned on.
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NOTE: Operation of radiator and condenser fans is controlled by
vehicle Powertrain Control Module (PCM). Based on vehicle
speed, coolant temperature and A/C operation request, PCM
will command low, medium or high speed fan operation.
3000GT
1) If neither the radiator fan nor the condenser fan operate,
check fusible link No. 5 (40-amp). See WIRING DIAGRAMS. If only the
condenser fan does not operate, check dedicated fuse No. 8 (20-amp).
2) If the condenser fan operates in all speeds except low and
A/C compressor clutch does not enter the ON state, check for A/C
compressor lock controller unit output signal. If the A/C compressor
clutch does enter the ON state, check condenser fan low speed relay
operation.
3) If the radiator fan and the condenser fan operate in all
speeds except high, check PCM. See appropriate G - TESTS W/CODES
article in ENGINE PERFORMANCE. If fan operation is not as specified,
check wiring harness for opens or shorts. Repair as necessary.
* G - TESTS W/CODES - NON-TURBO - 1997
* G - TESTS W/CODES - TURBO - 1997
* G - TESTS W/CODES - 1998
4) To confirm radiator fan or condenser fan operation, see
appropriate FAN OPERATING MODE (3000GT) table. If fan operation is not\
as specified, check wiring harness for opens or shorts. Repair as
necessary.
FAN OPERATING MODE (3000GT)
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Power Circuit
Coolant Operating Radiator Condenser
Temp.
F (C) Low/High Fan Speed Fan Speed
50 MPH ( 1) ( 2)
203 (95) ( 2) ........ Off/Off ....... Off ................ Off
203-221 (95-105) ..... On/Off ....... Low ................ Off\
221 (105) ( 3) ........ On/On ........ High .............. High
50 MPH ( 1) ( 3)
221 (105) ( 2) ....... Off/Off ....... Off ................ Off
221 (105) ( 3) ........ On/On ........ High .............. High
All Speeds
221 (105) ( 2) ........ On/Off ....... Low ................ Low
221 (105) ( 3) ........ On/On ........ High .............. High
Page 327 of 1501
1) If PCM DTC P0120 (engine performance code) is also set,
see
CLOSED THROTTLE POSITION SWITCH TEST & THROTTLE POSITION SENSOR TEST
under COMPONENT TESTS. If DTC P0120 is not set, go to next step.
2) Check cruise control ECU connector C-50. If connector is
okay, go to next step. If connector is defective, repair as necessary.
3) If malfunction remains, inspect harness between throttle
position sensor and cruise control ECU. Repair as necessary. If
harness is okay, replace cruise control ECU.
PIN VOLTAGE TESTS
Fig. 36: Pin Voltage Chart (1 Of 2)
Courtesy of Mitsubishi Motor Sales of America
Page 331 of 1501
D - ADJUSTMENTS
1998 Mitsubishi Montero
1998 ENGINE PERFORMANCE
Mitsubishi - On-Vehicle Adjustments
Diamante, Eclipse, Galant, Mirage, Montero, Montero Sport,
3000GT
ENGINE MECHANICAL
Before performing any on-vehicle adjustments to fuel or
ignition system, ensure engine mechanical condition is okay (i.e.,
engine compression).
VALVE CLEARANCE
VALVE ADJUSTMENT
NOTE: All models use hydraulic valve lifters. Adjustment is not
required.
CHECKING HYDRAULIC VALVE LIFTERS
1) Warm engine to normal operating temperature. Remove valve
cover. Position cylinder No. 1 at TDC on compression stroke. On 4-
cylinder engines, check intake rockers on cylinders No. 1 and 2. Check
exhaust rockers on cylinders No. 1 and 3. On V6 engines, check intake
rockers on cylinders No. 1, 5 and 6. Check exhaust rockers on
cylinders No. 1, 2 and 3.
2) Push downward on end of rocker arm, above lash adjuster.
Rotate crankshaft 360 degrees. On 4-cylinder engines, check intake
rockers on cylinders No. 3 and 4. Check exhaust rockers on cylinders
No. 2 and 4. On V6 engines, check intake rockers on cylinders No. 2, 3
and 4. Check exhaust rockers on cylinders No. 4, 5 and 6. If lash
adjuster is normal, it will feel solid.
3) If lash adjuster moves downward easily when pushed,
replace adjuster. If lash adjuster feels soft or spongy, air has
probably entered lash adjuster. If this occurs, check engine oil
level. If engine oil level is okay, check oil screen and oil screen
gasket for damage.
4) After repairing cause of air ingestion, warm engine to
operating temperature. Drive vehicle at low speed for approximately 5
minutes. Turn engine off for a few minutes.
5) Restart engine and drive at low speed for approximately 5
minutes. Repeat this step several times for about one hour. This helps
remove air from engine oil.
IGNITION TIMING
NOTE: Perform all checks with engine at normal operating
temperature, cooling fan and accessories off, transmission
in Park or Neutral, and front wheels in straight-ahead
position. Ignition timing check procedure for Eclipse 2.0L
non-turbo not available from manufacturer at time of
publication.
Diamante
1) Ignition timing is controlled by Powertrain Control Module
(PCM) and is not adjustable. Manufacturer provides procedure for
checking timing. DO NOT attempt to adjust ignition timing by rotating
Page 333 of 1501
![MITSUBISHI MONTERO 1998 Owners Guide IGNITION TIMING
IGNITION TIMING SPECIFICATIONS (Degrees BTDC @ RPM) TABLE\
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IGNITION TIMING SPECIFICATIONS (Degrees BTDC @ RPM) TABLE\
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IGNITION TIMING
IGNITION TIMING SPECIFICATIONS (Degrees BTDC @ RPM) TABLE\
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Application ( 1) Basic ( 2) ( 3) ( 4) Actual
1.5L ................ 2-8 @ 650-750 ....... 10 @ 600-800
1.8L ................ 2-8 @ 600-800 ........ 5 @ 600-800
2.0L
Non-Turbo .............. ( 5) ..................... ( 5)
Turbo ............. 2-8 @ 650-850 ........ 8 @ 650-850
2.4L ................ 2-8 @ 650-850 ....... 10 @ 650-850
3.0L ................ 2-8 @ 600-800 ....... 15 @ 600-800
3.5L ................ 2-8 @ 600-800 ....... 15 @ 600-800
( 1) - With ignition timing adjustment connector grounded or
vacuum hose (farthest from distributor) disconnected.
( 2) - With ignition timing adjustment connector ungrounded
or vacuum hose (farthest from distributor) connected.
( 3) - If vehicle altitude is more than 2300 feet above sea
level, actualtiming may be advanced (5 degrees).
( 4) - Actual ignition timing is approximate and may
fluctuate plus or minus 7 degrees.
( 5) - Ignition timing is NOT adjustable.
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Fig. 2: Locating Data Link Connector (Typical)
Courtesy of Mitsubishi Motor Sales of America
3000GT (DOHC)
1) Ignition timing is controlled by Powertrain Control Module
(PCM) and is not adjustable. Manufacturer provides procedure for
checking timing.
2) Start engine and warm engine until engine temperature