1998 MITSUBISHI MONTERO spark plugs

immobilizer CD changer gas mileage remote start fog light deactivate passenger airbag

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$MITSUBISHI MONTERO 1998 Service Manual (2) - Use Texaco MTX FM fluid.��\ ��\ ��\ ��\ ��\ ��\ �� QUICK-SERVICE SERV$

(2) - Use Texaco MTX FM fluid.\
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QUICK-SERVICE
SERVICE INTERVALS & SPECIFICATIONS
REPLACEMENT INTERVALS TABLE (DIAMANTE)\
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Component Miles
Air Filter ........................................ 30,000
Automatic Transaxle Fluid ............................ ( 1)
Coolant ........................................... 30,000
Oil ................................................. 7500
Oil Filter .................................... ( 2) 15,000
Spark Plugs ....................................... 60,000
Spark Plug Wires .................................. 60,000
Timing Belt ....................................... 60,000
( 1) - Inspect fluid every 15,000 miles. Replace fluid if
evidence of contamination appears, after repairing
reason for contamination.
( 2) - Replace oil filter at oil change if annual mileage is
less than 7500 miles.
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REPLACEMENT INTERVALS TABLE (ECLIPSE)\
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Component Miles
Air Filter ........................................ 30,000
Automatic Transaxle Fluid ............................ ( 1)
Coolant ........................................... 30,000
Oil
Non-Turbo ......................................... 7500
Turbo ............................................. 5000
Oil Filter
Non-Turbo ................................... ( 2) 15,000
Turbo ....................................... ( 2) 10,000
Spark Plugs ....................................... 30,000
Spark Plug Wires .................................. 60,000
Transfer Case Fluid .................................. ( 3)
Timing Belt ....................................... 60,000
( 1) - Inspect fluid every 15,000 miles. Replace fluid if
evidence of contamination appears, after repairing
reason for contamination.
( 2) - Replace oil filter at oil change if annual mileage is
less than 7500 miles.
( 3) - Inspect fluid every 30,000 miles. Replace fluid if
evidence of contamination appears, after repairing
reason for contamination.
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REPLACEMENT INTERVALS TABLE (GALANT)\
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Component Miles
Air Filter ........................................ 30,000
Automatic Transaxle Fluid ............................ ( 1)
Coolant .............................................. ( 2)

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MITSUBISHI MONTERO 1998 Service Manual Oil ................................................. 7500
Oil Filter .................................... (3) 15,000
Spark Plugs ....................................... 30,000
Spark Plug Wires

Oil ................................................. 7500
Oil Filter .................................... (3) 15,000
Spark Plugs ....................................... 30,000
Spark Plug Wires .................................. 60,000
Timing & Balance Shaft Belts ...................... 60,000
( 1) - Inspect fluid every 15,000 miles. Replace fluid if
evidence of contamination appears, after repairing
reason for contamination.
( 2) - Inspect fluid every 30,000 miles. Replace fluid if
evidence of contamination appears, after repairing
reason for contamination.
( 3) - Replace oil filter at oil change if annual mileage is
less than 7500 miles.
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REPLACEMENT INTERVALS TABLE (MIRAGE)\
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Component Miles
Air Filter ........................................ 30,000
Automatic Transaxle Fluid ............................ ( 1)
Coolant .............................................. ( 2)
Oil ................................................. 7500
Oil Filter .................................... ( 3) 15,000
Spark Plugs ....................................... 30,000
Spark Plug Wires .................................. 60,000
Timing Belt ....................................... 60,000
( 1) - Inspect fluid every 15,000 miles. Replace fluid if
evidence of contamination appears, after repairing
reason for contamination.
( 2) - Inspect fluid every 30,000 miles. Replace fluid if
evidence of contamination appears, after repairing
reason for contamination.
( 3) - Replace oil filter at oil change if annual mileage is
less than 7500 miles.
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REPLACEMENT INTERVALS TABLE (MONTERO)\
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Component Miles
Air Filter ........................................ 30,000
Automatic Transmission Fluid ......................... ( 1)
Coolant ........................................... 30,000
Front & Rear Axle Fluid ( 2) ....................... 30,000
Oil ................................................. 7500
Oil Filter .................................... ( 3) 15,000
Manual Transmission .................................. ( 4)
Spark Plugs ( 5) ................................... 60,000
Spark Plug Wires .................................. 60,000
Timing Belt ....................................... 60,000
( 1) - Inspect fluid every 15,000 miles. Replace fluid if
evidence of contamination appears, after repairing
reason for contamination.
( 2) - Limited-slip differential.
( 3) - Replace oil filter at oil change if annual mileage is
less than 7500 miles.
( 4) - Inspect fluid every 30,000 miles. Replace fluid if
evidence of contamination appears, after repairing
reason for contamination.

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$MITSUBISHI MONTERO 1998 Service Manual (5) - Use Platinum spark plugs only.��\ ��\ ��\ ��\ ��\ ��\ �� REPLACEMENT INTERVALS TABLE (MON$

(5) - Use Platinum spark plugs only.\
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REPLACEMENT INTERVALS TABLE (MONTERO SPORT)\
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Component Miles
Air Filter ........................................ 30,000
Automatic Transmission
Except 4WD ......................................... ( 1)
4WD ............................................. 30,000
Axle Fluid ( 2) .................................... 30,000
Coolant ........................................... 30,000
Oil ................................................. 7500
Oil Filter .................................... ( 3) 15,000
Spark Plugs ( 4) ................................... 60,000
Spark Plug Wires .................................. 60,000
Timing Belt ....................................... 60,000
( 1) - Inspect fluid every 15,000 miles. Replace fluid if
evidence of contamination appears, after repairing
reason for contamination.
( 2) - Limited-slip differential.
( 3) - Replace oil filter at oil change if annual mileage is
less than 7500 miles.
( 4) - Use Platinum spark plugs only.
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REPLACEMENT INTERVALS TABLE (3000GT)\
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Component Miles
Air Filter ........................................ 30,000
Automatic Transaxle Fluid ............................ ( 1)
Coolant ........................................... 30,000
Oil
Non-Turbo ......................................... 7500
Turbo ............................................. 5000
Oil Filter
Non-Turbo ....................................... 15,000
Turbo ........................................... 10,000
Spark Plugs
Except Platinum ................................. 30,000
Platinum ........................................ 60,000
Spark Plug Wires ( 2) .............................. 60,000
Timing Belt ....................................... 60,000
( 1) - Inspect fluid every 15,000 miles. Replace fluid if
evidence of contamination appears, after repairing
reason for contamination.
( 2) - Except vehicles equipped with Federal Emissions.
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BELT ADJUSTMENT TABLE\
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( 1) Deflection ( 1) Deflection
Application New Belt - In. (mm) Used Belt - In. (mm\
)
Diamante
Generator & A/C .... .24-.28 (6.0-7.2) ....... .32-.37 (8.2-9.3\
)
P/S ................ .33-.37 (8.4-9.3) ..... .46-.52 (11.7-13.4\
)
Eclipse
2.0L Non-Turbo

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$MITSUBISHI MONTERO 1998 Service Manual Generator ........ .30-.41 (7.5-10.5) ..... .35-.47 (9.0-12.0\ ) P/S (W/O A/C) .... .26-.37 (6.5-9.5) ..... .43-.55 (11.0-14\ .0) P/S & A/C ........ .32-.35 (8.0-9.0) ..... .39$

Generator ........ .30-.41 (7.5-10.5) ..... .35-.47 (9.0-12.0\
)
P/S (W/O A/C) .... .26-.37 (6.5-9.5) ..... .43-.55 (11.0-14\
.0)
P/S & A/C ........ .32-.35 (8.0-9.0) ..... .39-.43 (10.0-11.0\
)
2.0L Turbo & 2.4L
A/C .............. .22-.24 (5.5-6.0) ....... .26-.30 (6.5-7.5\
)
Generator ........ .30-.35 (7.5-9.0) .............. .39 (10.0\
)
P/S .............. .18-.22 (4.5-5.5) ....... .24-.28 (6.0-7.0\
)
Galant
A/C ................ .22-.24 (5.5-6.0) ....... .26-.30 (6.5-7.6\
)
Generator .......... .30-.35 (7.5-8.8) .............. .39 (10.0\
)
P/S ................ .18-.22 (4.5-5.6) ....... .24-.28 (6.0-7.0\
)
Mirage
1.5L
A/C .............. .13-.17 (3.4-4.3) ....... .20-.22 (5.0-5.7\
)
Generator ........ .26-.33 (6.6-8.3) ...... .36-.42 (9.2-10.6\
)
P/S .............. .28-.36 (7.2-9.0) ..... .40-.46 (10.2-11.6\
)
1.8L
Generator ........ .28-.31 (7.0-8.0) ...... .33-.39 (8.5-10.0\
)
P/S & A/C ........ .28-.36 (7.0-9.0) ..... .39-.43 (10.0-11.0\
)
Montero
A/C ................ .20-.24 (5.0-6.0) ....... .26-.30 (6.5-7.5\
)
Generator .......... .16-.20 (4.0-5.0) ....... .22-.26 (5.5-6.5\
)
P/S ................ .42-.54 (10.7-13.7) ... .58-.66 (14.8-16.8\
)
Montero Sport
2.4L
A/C .............. .20-.22 (5.0-6.0) ....... .24-.26 (6.0-6.5\
)
Generator ........ .22-.29 (5.5-7.5) ....... .30-.33 (7.5-8.5\
)
P/S .............. .16-.24 (4.0-6.0) ....... .24-.28 (6.0-7.0\
)
3.0L
A/C .............. .17-.20 (4.3-5.1) ....... .22-.26 (5.6-6.5\
)
Generator ........ .22-.29 (5.5-7.5) ....... .31-.35 (8.0-9.0\
)
P/S .............. .44-.52 (11.0-13.0) ... .56-.64 (14.0-16.0\
)
3000GT
SOHC
A/C .............. .26-.28 (6.5-7.0) ....... .30-.34 (7.5-8.5\
)
Generator & P/S .. .16-.20 (4.0-5.0) ....... .24-.32 (6.0-8.0\
)
DOHC
Generator ........ .14-.16 (3.5-4.0) ....... .16-.20 (4.0-5.0\
)
P/S .............. .30-.35 (7.5-9.0) ..... .41-.49 (10.4-12.4\
)
(1) - With 22 lbs. (10 kg) pressure applied midway between pulleys.
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MECHANICAL CHECKS
ENGINE COMPRESSION
Check engine compression with engine at normal operating
temperature, all spark plugs removed and throttle wide open.
COMPRESSION SPECIFICATIONS TABLE
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Application (1) Specification
Compression Ratio
1.5L (VIN A) ..................................... 9.0:1
1.8L (VIN C) ..................................... 9.5:1
2.0L
(VIN F) ........................................ 8.5:1
(VIN Y) ........................................ 9.6:1
2.4L (VIN G) ..................................... 9.5:1
3.0L

Page 253 of 1501

MITSUBISHI MONTERO 1998 Service Manual except Eclipse 2.0L non-turbo and Montero. On Eclipse 2.0L non-turbo,
resistance should not exceed 8000 ohms. On Montero, resistance should
not exceed 26,000 ohms.
SPARK PLUGS
SPARK PLUG TYPE

Page 338 of 1501

MITSUBISHI MONTERO 1998 Service Manual Application Curb Idle Basic Idle
1.5L & 1.8L ............ 600-800 ............... 650-750
2.0L
Non-Turbo ............ 700-900 ................... (1)
Turbo ...

Application Curb Idle Basic Idle
1.5L & 1.8L ............ 600-800 ............... 650-750
2.0L
Non-Turbo ............ 700-900 ................... (1)
Turbo ................ 650-850 ............... 700-800
2.4L ................... 650-850 ............... 700-800
3.0L & 3.5L ............ 600-800 ............... 650-750
( 1) - Information is not available from manufacturer at time
of publication.
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NOTE: Basic idle speed should only be adjusted after verifying
spark plugs, fuel injectors, idle air control motor and
engine compression are okay.
All Other Models
1) Ensure vehicle is at normal operating temperature with all
lights, cooling fan and accessories off. Shift transmission into
Neutral or Park position.
2) Basic idle speed can only be adjusted using a scan tool to
ground Data Link Connector (DLC). Connect scan tool to DLC. DLC is
located below dash, near steering column. See Fig. 2.
3) Start engine and allow it to idle. Using scan tool, select
MFI SYSTEM ACTUATOR TEST, then select item 30. Check basic idle speed.
See IDLE SPEED SPECIFICATIONS table.
CAUTION: MFI system actuator test must be cancelled or test will
continue to run for 27 minutes. Driving vehicle under this
condition may damage engine.
4) Cancel MFI system actuator test. If idle speed is not
within specification, turn engine speed adjusting screw until correct
engine speed is obtained. See Fig. 6. Access to speed adjusting screw
is obtained by removing rubber plug on throttle body.
5) If idle speed cannot be lowered by turning engine speed
adjusting screw, determine if fixed Speed Adjusting Screw (SAS). Fixed\
SAS is stop screw contacting throttle lever. See
FIXED SPEED ADJUSTING SCREW for procedure.
6) After all adjustments are verified to be correct, possible
cause of incorrect idle speed is deterioration of Idle Air Control
(IAC) circuit. See DTC P0505 in G - TESTS W/CODES article.
CURB (SLOW) IDLE SPEED
NOTE: Curb idle speed is controlled by Idle Air Control (IAC)
motor. Adjustment is usually not necessary. For curb idle
speed specifications, see IDLE SPEED SPECIFICATIONS table
under BASIC IDLE SPEED.
1) Check ignition timing and adjust if necessary. See
IGNITION TIMING . Run engine at 2000-3000 RPM for more than 5 seconds.
Allow engine to idle for 2 minutes. Check curb idle speed.
2) If curb idle speed is not within specification, check IAC
system. See DTC P0505 in G - TESTS W/CODES article. If IAC system is
okay, adjust basic idle speed. See BASIC IDLE SPEED.
FIXED SPEED ADJUSTING SCREW
NOTE: Fixed Speed Adjusting Screw (SAS) is preset by manufacturer
and usually does not require adjustment. Only adjust fixed
SAS if other adjustment procedures require it, or if

Page 459 of 1501

MITSUBISHI MONTERO 1998 Service Manual pressure regulator diaphragm opens relief valve, allowing pressure to
bleed off through fuel return line, reducing fuel pressure.
As engine manifold vacuum decreases (open throttle), fuel
pre

pressure regulator diaphragm opens relief valve, allowing pressure to
bleed off through fuel return line, reducing fuel pressure.
As engine manifold vacuum decreases (open throttle), fuel
pressure regulator diaphragm closes valve, preventing pressure from
bleeding off through fuel return line, increasing fuel pressure.
FUEL CONTROL
Fuel Injectors
Fuel is supplied to engine through electronically pulsed
(timed) injector valves located on fuel rail(s). PCM controls amount\
of fuel metered through injectors based on information received from
sensors.
IDLE SPEED
Air Conditioning (A/C) Relay
When A/C is turned on with engine at idle, PCM signals IAC
motor to increase idle speed. To prevent A/C compressor from switching
on before idle speed has increased, PCM momentarily opens A/C relay
circuit.
Idle Air Control (IAC) Motor
Motor controls pintle-type air valve to regulate volume of
intake air at idle.
During start mode, PCM controls idle intake air volume
according to Engine Coolant Temperature (ECT) sensor input. After
starting, with idle position switch activated (throttle closed), fast
idle speed is controlled by IAC motor and fast idle air control valve
(if equipped).
When idle switch is deactivated (throttle open), IAC motor
moves to a preset position in accordance with ECT sensor input.
PCM signals IAC motor to increase engine RPM in the following
situations: A/T (if applicable) is shifted from Neutral to Drive, A/C
is turned on, or power steering pressure reaches a preset value.
IGNITION SYSTEMS
DIRECT IGNITION SYSTEM (DIS)
Depending on number of cylinders, ignition system is a 2 or
3-coil, distributorless ignition system. On Eclipse (Turbo) and DOHC
V6 engines, Camshaft Position (CMP) sensor is located beside camshaft,\
in front of engine. On all other engines equipped with DIS, CMP sensor
is a separate unit mounted in place of distributor. On DOHC 4-
cylinder, DOHC V6 and 1.8L 4-cylinder engines with California
emissions, Crankshaft Position (CKP) sensor is located beside
crankshaft, in front of engine. PCM determines TDC based on pulse
signals received from sensors and then controls MFI and ignition
timing.
Power Transistors & Ignition Coils
Based on crankshaft position and CMP sensor inputs, PCM
controls timing and directly activates each power transistor to fire
coils. On 4-cylinder engines, power transistor "A" controls primary
current of ignition coil "A" to fire spark plugs on cylinders No. 1
and No. 4 at the same time. Power transistor "B" controls primary
current of ignition coil "B" to fire spark plugs on cylinders No. 2
and No. 3 at the same time. On V6 engines, companion cylinders No. 1
and 4, 2 and 5, and 3 and 6 are fired together.
On all models, although each coil fires 2 plugs at the same
time, ignition takes place in only one cylinder, since the other

Page 561 of 1501

MITSUBISHI MONTERO 1998 Service Manual than .010" (.25 mm) from tip. Chamfer sharp edge of reground valve
tip. Recheck valve stem installed height.
VALVE STEM OIL SEALS
Valve stem oil seals must be installed on valve stem

than .010" (.25 mm) from tip. Chamfer sharp edge of reground valve
tip. Recheck valve stem installed height.
VALVE STEM OIL SEALS
Valve stem oil seals must be installed on valve stem. See
Fig. 2 . Seals are needed due to pressure differential at the ends of
valve guides. Atmospheric pressure above intake guide, combined with
manifold vacuum below guide, causes oil to be drawn into the cylinder.
Exhaust guides also have pressure differential created by
exhaust gas flowing past the guide, creating a low pressure area. This
low pressure area draws oil into the exhaust system.
Replacement (On Vehicle)
Mark rocker arm or overhead cam components for location.
Remove rocker arm components or overhead cam components. Components
must be installed in original location. Remove spark plugs. Valve stem
oil seals may be replaced by holding valves against seats using air
pressure.
Air pressure must be installed in cylinder using an adapter
for spark plug hole. An adapter can be constructed by welding air hose
connection to spark plug body with porcelain removed.
Install adapter in spark plug hole. Apply a minimum of 140
psi (9.8 kg/cm
) to adapter. Air pressure should hold valve closed. If
air pressure does not hold valve closed, check for damaged or bent
valve. Cylinder head must be removed for service.
Using valve spring compressor, compress valve springs. Remove
valve locks. Carefully release spring compressor. Remove retainer or
rotator and valve spring. Remove valve stem oil seal.
If oversized valves have been installed, oversized oil seals
must be used. Coat valve stem with engine oil. Install protective
sleeve over end of valve stem. Install new oil seal over valve stem
and seat on valve guide. Remove protective sleeve. Install spring
seat, valve spring and retainer or rotator. Compress spring and
install valve locks. Remove spring compressor. Ensure valve locks
are fully seated.
Install rocker arms or overhead cam components. Tighten all
bolts to specification. Adjust valves if required. Remove adapter.
Install spark plugs, valve cover and gasket.
VALVE SPRING INSTALLED HEIGHT
Valve spring installed height should be checked during
reassembly. Measure height from lower edge of valve spring to the
upper edge. DO NOT include valve spring seat or retainer. Distance
must be within specifications. If valves and/or seats have been
ground, a valve spring shim may be required to correct spring height.
See Fig. 12 .
Fig. 12: Measuring Valve Spring Installed Height - Typical
This Graphic For General Information Only

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