fuel cap MITSUBISHI MONTERO 1991 User Guide
[x] Cancel search | Manufacturer: MITSUBISHI, Model Year: 1991, Model line: MONTERO, Model: MITSUBISHI MONTERO 1991Pages: 1333, PDF Size: 24.61 MB
Page 717 of 1333
Greater Than 32
F (0
C) ...... SAE 20W-40 Or 20W-50 API SG/CD
Greater Than -10
F (-23
C) ..... SAE 10W-30, 10W-40 API SG/CD
Maximum Temperature
Less Than 60
F (16
C) .......... SAE 5W-30 Or 5W-40 API SG/CD
(
1) - Since temperature ranges for different oil grades overlap,
brief fluctuations in outside temperatures are no cause for
concern.
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Fluid Capacities
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Application Quantity
Engine Oil
1987 ......................................... 5.2 Qts. (5.0L)
1988 ......................................... 5.0 Qts. (4.8L)
1989-92 ...................................... 5.5 Qts. (5.3L)
1993-95 ...................................... 5.2 Qts. (4.9L)
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90,000 MILE (144,000 KM) SERVICE
90,000 MILE (144,000 KM) SERVICE \
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Service Or Inspect
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Verify Last Major Service Was Performed
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Valve Clearance (Jet Valve Only)
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Manual Transmission Oil & Transfer Case
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Carburetor Choke Mechanism & Linkage (If Equipped)
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Disc Brake Pads
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Drum Brake Linings & Rear Wheel Cylinders
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Brake Hoses
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Fuel & Vapor Hoses
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Steering Linkage Seals & Drive Shaft Boots
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Lubricate Ball Joint
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Lubricate Front Wheel Bearing
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Lubricate Drive Shaft Joints
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Exhaust System
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Lubricate Upper Control Arm Bushings
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Drive Belt (Water Pump & Alternator)
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![MITSUBISHI MONTERO 1991 User Guide \
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Fluid Capacities](/img/19/57332/w960_57332-720.png "MITSUBISHI MONTERO 1991 User Guide \
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Fluid Capacities")
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Fluid Capacities
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Application Quantity
Automatic Transmission
1987-93 ...................................... 7.6 Qts. (7.2L)
1994 (3.0L SOHC) ............................. 7.6 Qts. (7.2L) \
1994 (3.0L DOHC & 3.5L) ...................... 9.0 Qts. (8.5L) \
1995 ......................................... 7.9 Qts. (7.5L)
Cooling System
1987-88 ...................................... 8.5 Qts. (8.0L)
1989-95
2.6L ........................................ 9.7 Qts. (9.2L)
3.0L ....................................... 10.0 Qts. (9.5L)
1994-95
3.5L ....................................... 10.0 Qts. (9.5L)
Differential
1987-88 ...................................... 1.9 Qts. (1.8L)
1989-94
2.6L ........................................ 1.9 Qts. (1.8L)
3.0L ........................................ 2.7 Qts. (2.6L)
1994
3.5L ........................................ 2.7 Qts. (2.6L)
1995
3.0L ........................................ 2.7 Qts. (2.6L)
3.5L ........................................ 3.3 Qts. (3.2L)
Engine Oil
1987 ......................................... 5.2 Qts. (5.0L)
1988 ......................................... 5.0 Qts. (4.8L)
1989-92 ...................................... 5.5 Qts. (5.3L)
1993-95 ...................................... 5.2 Qts. (4.9L)
Manual Transmission
1987-91 ...................................... 2.3 Qts. (2.2L)
1992 ......................................... 2.4 Qts. (2.3L)
1993-95 ...................................... 2.6 Qts. (2.5L)
Transfer Case
1987-91 ...................................... 2.3 Qts. (2.2L)
1992-95 ...................................... 2.4 Qts. (2.3L)
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110,000 MILE (176,000 KM) SERVICE (1987-90)
110,000 MILE (176,000 KM) SERVICE (1987-90) \
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Service Or Inspect
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Fuel System (Tank, Lines & Connections)
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Carburetor Or Throttle Body Mounting
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Replace
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Fuel Filter
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Fuel, Water & Vapor Hoses
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EGR Valve
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Oxygen Sensor
Page 723 of 1333
![MITSUBISHI MONTERO 1991 User Guide Manual Transmission Oil & Transfer Case
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Manual Transmission Oil & Transfer Case
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Carburetor Choke Mechanism & Linkage (2.6L Engine)
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Crankcase Emission Control System (PCV Valve)
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Evaporative Emission Control System
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Distributor Cap, Rotor & Spark Advanced System
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Intake Temperature Control System
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Secondary Air System
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Front Disc Pads
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Rear Drum Brake Linings & Wheel & Cylinders
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Brake Hoses
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Steering Linkage Seals & Drive Shaft Boots
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Lubricate Ball Joints
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Lubricate Front Wheel Bearing
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Drive Axle Fluid (Without Limited-Slip Differential)
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Lubricate Drive Shaft Joints
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Exhaust System
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Drive Belt (Water Pump & Alternator)
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Vacuum, Water, Crankcase Ventilation & Secondary Air Hoses
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Replace
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Air Filter
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Fuel Filter
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Spark Plugs
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Ignition Cables
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Camshaft Timing Belt
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Engine Coolant
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Engine Oil & Filter
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Vacuum Control System Solenoid Valve Air Filter
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Lubrication Specifications
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Application Specification
Brake & Clutch Fluid ............................ DOT 3 Or DOT 4
Page 1147 of 1333
EMISSION SYSTEMS
EXHAUST GAS RECIRCULATION (EGR) CONTROL
Federal (Non-Turbocharged)
To lower oxides of nitrogen (NOx) exhaust emissions, a non-
computer controlled exhaust gas recirculation system is used. EGR
operation is controlled by throttle body ported vacuum. Vacuum is
routed through thermovalve to prevent EGR operation at low engine
temperatures.
Spring pressure holds EGR valve closed during low vacuum
conditions (engine idling or wide open throttle). When vacuum pressure\
increases and overcomes EGR spring pressure, EGR valve is lifted and
allows exhaust gases to flow into intake manifold for combustion.
California & Turbocharged
ECU controls EGR operation by activating EGR control solenoid
valve according to engine load. When engine is cold, ECU signals EGR
control solenoid valve to deactivate EGR.
California models are equipped with an EGR temperature
sensor. When EGR malfunction occurs, EGR temperature decreases and ECU
illuminates CHECK ENGINE (malfunction indicator) light.
EGR Control Solenoid Valve
Denies or allows vacuum supply to EGR valve, based upon ECU
commands.
Thermovalve
Denies or allows vacuum supply to EGR valve based on coolant
temperature.
EVAPORATIVE CONTROL
Fuel evaporation system prevents fuel vapor from entering
atmosphere. System consists of a special fuel tank with vapor
separator tanks (if equipped), vacuum relief filler cap, overfill
limiter (2-way valve), fuel check valve, thermovalve (if equipped),
charcoal canister, purge control valve, purge control solenoid valve
and connecting lines and hoses.
Purge Control Solenoid Valve
When engine is off, fuel vapors are vented into charcoal
canister. When engine is warmed to normal operating temperature and
running above idle, ECU energizes purge control solenoid valve,
allowing vacuum to purge valve.
Canister vapors are then drawn through purge valve into
intake manifold for burning. Purge control solenoid valve remains
closed during idle and engine warm-up to reduce HC and CO emissions.
HIGH ALTITUDE CONTROL (HAC)
This system compensates for variations in altitude. When
atmospheric (barometric) pressure sensor determines vehicle is above
preset altitude, ECU compensates by adjusting air/fuel mixture and
ignition timing. If HAC system is inoperative, there will be an
increase in emissions.
PCV VALVE
Positive Crankcase Ventilation (PCV) valve operates in the
closed crankcase ventilation system. Closed crankcase ventilation
Page 1213 of 1333
Air in fuel system Bleed air from system
Incorrect or contaminated Replace fuel
fuel
Injector nozzle malfunction Check nozzles, see
FUEL SYSTEMS
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Engines Starts Injection pump timing Reset pump timing, see
and Idles Rough incorrect FUEL SYSTEMS
W/out Smoke or Engine not fully broken in Put more miles on
Noise, But Clears engine
After Warm-Up Air in system Bleed air from system
Injector nozzle malfunction Check nozzles, see
FUEL SYSTEMS
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Engine Idles Blocked fuel filter Replace fuel filter
Correctly, Injection pump timing Reset pump timing, see
Misfires Above incorrect FUEL SYSTEMS
Idle Incorrect or contaminated Replace fuel
fuel
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Engine Won't Fast idle adjustment Reset fast idle, see
Return To Idle incorrect TUNE-UP
Internal injection pump Replace injection pump,
malfunction see FUEL SYSTEMS
External linkage binding Check linkage and
remove binding
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Fuel Leaks On Loose or broken fuel line Check lines and
Ground connections
Internal injection pump Replace injection pump,
seal leak see FUEL SYSTEMS
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Cylinder Injector nozzles sticking Test injectors, see
Knocking Noise open FUEL SYSTEMS
Very low nozzle opening Test injectors and/or
pressure replace
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Loss of Engine Restricted air intake Remove restriction
Power EGR valve malfunction Replace EGR valve
Blocked or damaged exhaust Remove restriction
system and/or replace
components
Blocked fuel tank filter Replace filter
Restricted fuel filter Remove restriction
and/or replace filter
Block vent in gas cap Remove restriction
and/or replace cap
Tank-to-injection pump fuel Check fuel lines and
supply blocked connections
Blocked fuel return system Remove restriction
Incorrect or contaminated Replace fuel
fuel
Blocked injector nozzles Check nozzle for
blockage, see FUEL
SYSTEMS
Low compression Check valves, rings,
pistons, see ENGINES
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Loud Engine Basic timing incorrect Reset timing, see
Noise With Black FUEL SYSTEMS
Smoke EGR valve malfunction Replace EGR valve
Internal injection pump Replace injection pump,
malfunction see FUEL SYSTEMS
Page 1215 of 1333
Low fuel pressure Test pressure regul-
ator and fuel pump,
check for restricted
lines and filters
No distributor reference Repair ignition
pulses system as necessary
Open coolant temperature Test sensor and
sensor circuit wiring
Shorted W.O.T. switch in Disconnect W.O.T.
T.P.S. switch, engine
should start
Defective ECM Replace ECM
Fuel tank residual pressure Test for fuel
valve leaks pressure drop after
shut down
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Hard Starting Disconnected hot air tube Reconnect tube and
to air cleaner test control valve
Defective Idle Air Control Test valve operation
(IAC) valve and circuit
Shorted, open or misadjusted Test and adjust or
T.P.S. replace T.P.S.
EGR valve open Test EGR valve and
control circuit
Poor Oxygen sensor signal Test for shorted or
circuit
Incorrect mixture from PCV Test PCV for flow,
system check sealing of oil
filter cap
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Poor High Speed Low fuel pump volume Faulty pump or
Operation restricted fuel
lines or filters
Poor MAP sensor signal Test MAP sensor,
vacuum hose and
wiring
Poor Oxygen sensor signal Test for shorted or
open sensor or
circuit
Open coolant temperature Test sensor and
sensor circuit wiring
Faulty ignition operation Check wires for
cracks or poor con-
nections, test
secondary voltage
with oscilloscope
Contaminated fuel Test fuel for water
Page 1216 of 1333
or alcohol
Intermittent ECM ground Test ECM ground
connection for
resistance
Restricted air cleaner Replace air cleaner
Restricted exhaust system Test for exhaust
manifold back
pressure
Poor MAF sensor signal Check leakage
between sensor and
manifold
Poor VSS signal If tester for ALCL
hook-up is available
check that VSS
reading matches
speedometer
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Ping or Knock on Poor Knock sensor signal Test for shorted or
Acceleration open sensor or
circuit
Poor Baro sensor signal Test for shorted or
open sensor or
circuit
Improper ignition timing See VEHICLE EMISSION
CONTROL LABEL (where
applicable)
Check for engine Low coolant, loose
overheating problems belts or electric
cooling fan
inoperative
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NOTE: For additional electronic fuel injection trouble shooting
information, see the appropriate article in the ENGINE
PERFORMANCE section (not all vehicles have Computer Engine
Control articles). Information is provided there for
diagnosing fuel system problems on vehicles with electronic
fuel injection.
IGNITION SYSTEM TROUBLE SHOOTING
NOTE: This is GENERAL information. This article is not intended
to be specific to any unique situation or individual vehicle
configuration. The purpose of this Trouble Shooting
information is to provide a list of common causes to
problem symptoms. For model-specific Trouble Shooting,
refer to SUBJECT, DIAGNOSTIC, or TESTING articles available
in the section(s) you are accessing.
Ignition Secondary Trouble Shooting Chart
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START: Visually inspect Spark Plug Wires, Coil Wires,
Plug Wire Boots, Rotor, and Distributor Cap for
signs of damage.
Page 1224 of 1333
![MITSUBISHI MONTERO 1991 User Guide ignition switch
Open circuit between Repair circuit
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\](/img/19/57332/w960_57332-1223.png "MITSUBISHI MONTERO 1991 User Guide ignition switch
Open circuit between Repair circuit
ignition switch and
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ignition switch
Open circuit between Repair circuit
ignition switch and
starter solenoid
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Engine Runs Fuel lines leaking or Tighten fitting,
Rough clogged remove restriction
Initial timing incorrect Reset ignition timing
see ENGINE PERFORMANCE
Centrifugal advance Repair distributor
malfunction advance
Defective spark plugs or Replace plugs or plug
wiring wiring
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Component Failure Spark arc-over on cap, Replace cap, rotor or
rotor or coil or coil
Defective pick-up coil Replace pick-up coil
Defective ignition coil Replace ignition coil
Defective vacuum unit Replace vacuum unit
Defective control module Replace control module
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BASIC ELECTRONIC IGNITION TROUBLE SHOOTING
CHARTS - USING OSCILLOSCOPE PATTERNS
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CONDITION POSSIBLE CAUSE CORRECTION \
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Firing Voltage Retarded ignition timing Reset ignition
Lines are the Same, timing, see ENGINE
but Abnormally High PERFORMANCE section
Fuel mixture too lean Readjust carburetor,
see ENGINE PERFORMANCE
High resistance in coil Replace coil wire
wire
Corrosion in coil tower Clean and/or replace
terminal coil
Corrosion in distributor Clean and/or replace
coil terminal distributor cap
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Firing Voltage Fuel mixture too rich Readjust carburetor,
Lines are the Same see ENGINE PERFORMANCE
but Abnormally Low
Breaks in coil wire causing Replace coil wire
arcing
Cracked coil tower causing Replace coil
arcing
Low coil output Replace coil
Low engine compression Determine cause and
Page 1227 of 1333
Engine cold and choke too Adjust choke and
lean allow engine to warm-
up
Defective spark plugs Replace spark plugs
Defective coil Replace coil
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Faulty Low Speed Clogged idle transfer slots Clean idle transfer
Operation slots, see FUEL
Restricted idle air bleeds Disassemble and clean
and passages carburetor, see FUEL
Clogged air cleaner Replace air filter
Defective spark plugs Replace spark plugs
Defective ignition wires Replace ignition wire
see ENGINE PERFORMANCE
Defective distributor cap Replace distributor
cap
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Faulty High Speed Incorrect ignition timing Reset ignition timing
Operation see ENGINE PERFORMANCE
Defective distributor Replace advance
centrifugal advance mechanism
Defective distributor Replace advance unit
vacuum advance
Incorrect spark plugs or Check gap and/or
plug gap replace spark plugs
Faulty choke operation Check choke and
repair as required
Clogged vacuum passages Remove restrictions
Improper size or clogged Check jet size and
main jet clean, see FUEL
Restricted air cleaner Check filter and
replace as necessary
Defective distributor cap, Replace cap, rotor or
rotor or coil coil
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Misfire at All Defective spark plugs Replace spark plugs
Speeds
Defective spark plug wires Replace spark plug
wires
Defective distributor cap, Replace cap, rotor,
rotor, or coil or coil
Cracked or broken vacuum Replace vacuum hoses
hoses
Page 1228 of 1333
![MITSUBISHI MONTERO 1991 User Guide Vacuum leaks Repair vacuum leaks
Fuel lines clogged Remove restriction
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Fuel lines clogged Remove restriction
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Vacuum leaks Repair vacuum leaks
Fuel lines clogged Remove restriction
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Hesitation Cracked or broken vacuum Replace vacuum hoses
hoses
Vacuum leaks Repair Vacuum leaks
Binding carburetor linkage Eliminate binding
Binding throttle linkage Eliminate binding
Binding choke linkage or Eliminate binding
fast idle cam
Improper float setting Readjust float
setting, see FUEL
Cracked or broken ignition Replace ignition
wires wires
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Rough idle, Incorrect curb idle or fast Reset idle speed, see
Missing or idle speed see ENGINE PERFORMANCE
Stalling
Incorrect basic timing Reset ignition timing
see ENGINE PERFORMANCE
Improper idle mixture Reset idle mixture,
adjustment see ENGINE PERFORMANCE
Improper feedback system Check feedback system
operation see ENGINE PERFORMANCE
Incorrect spark plug gap Reset spark plug gap,
see ENGINE PERFORMANCE
Moisture in ignition Dry components
components
Loose or broken ignition Replace ignition
wires wires
Damaged distributor cap or Replace distributor
or rotor cap or rotor
Faulty ignition coil Replace ignition coil
Fuel filter clogged or worn Replace fuel filter
Damaged idle mixture screw Replace idle mixture
screw, see FUEL
Improper fast idle cam Reset fast idle cam
adjustment adjustment, see TUNE-
see ENGINE PERFORMANCE
Improper EGR valve operation Replace EGR valve
Faulty PCV valve air flow Replace PCV valve
Choke binding or improper Reset choke or
choke setting eliminate binding