fuel pressure MITSUBISHI MONTERO 1998 Service Manual
[x] Cancel search | Manufacturer: MITSUBISHI, Model Year: 1998, Model line: MONTERO, Model: MITSUBISHI MONTERO 1998Pages: 1501, PDF Size: 25.81 MB
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![MITSUBISHI MONTERO 1998 Service Manual Water Pump Bolt (Diamante)
8 mm Bolt .............................................. 18 (24)\
10 mm Bolt ............................................. 30 (41)\](/img/19/57333/w960_57333-14.png "MITSUBISHI MONTERO 1998 Service Manual Water Pump Bolt (Diamante)
8 mm Bolt .............................................. 18 (24)\
10 mm Bolt ............................................. 30 (41)\")
Water Pump Bolt (Diamante)
8 mm Bolt .............................................. 18 (24)\
10 mm Bolt ............................................. 30 (41)\
INCH Lbs. (N.m)
Crankshaft & Drive Plate
Bell Housing ............................................ 79.7 (9)\
Oil Seal Case .......................................... 97.3 (11)\
Rear Plate (Montero) ................................... 97.3 (11\
)
Exhaust Manifold
Heat Shield ........................................... 123.9 (14)\
Oil Level Gauge Guide Bolt ............................ 123.9 (14)\
Generator & Drive Belt
Cooling Fan Bolt (Montero) ............................. 97.3 (11\
)
Cooling Fan Nut (Montero) .............................. 97.3 (11\
)
Timing Indicator Bolt (Montero) ........................ 97.3 (11\
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Intake Manifold & Fuel
ECT Gauge Sender ....................................... 97.4 (11)\
Fuel Pressure Regulator Bolt ............................ 79.6 (9)\
Fuel Pipe Banjo Bolt .................................... 79.6 (9)\
Injector & Fuel Rail Bolt ............................. 106.2 (12)\
Water Outlet Pipe ..................................... 123.9 (14)\
Intake Plenum & Throttle Body
Ignition Coil Bolt (Montero) ............................ 115 (13\
)
Manifold Differential Pressure (MDP) Sensor ............. 44 (4.9\
)
Throttle Body Bolt ...................................... 106 (12)\
Vacuum Hose Assembly (Diamante) ......................... 88 (9.8\
)
Oil Pan & Oil Pump
Baffle Plate (Montero) ................................. 97.3 (11\
)
Baffle Plate (Diamante) ................................ 97.3 (11\
)
6 mm Bolt ............................................... 53.1 (6)\
8 mm Bolt ............................................... 79.6 (9)\
Oil Pump Cover Bolt (Diamante) ......................... 88.5 (10\
)
Oil Pump Cover Bolt (Montero)
6 mm x 10 mm Bolt .................................... 97.3 (11)\
6 mm x 18 mm Bolt ..................................... 53.1 (6)\
Oil Pressure Gauge Sender .............................. 88.5 (10)\
Oil Pan (Upper) ......................................... 53.1 (6\
)
Oil Pan (Lower) ........................................ 97.3 (11\
)
Oil Pump Case ......................................... 123.9 (14)\
Oil Screen (Montero)
6 mm Bolt ............................................. 53.1 (9)\
Rocker Arms & Camshafts
Rocker Cover Bolt ....................................... 31 (3.5)\
Thrust Case Bolt ...................................... 115.1 (13)\
Timing Belt
Camshaft Position (CMP) Sensor (Montero) ................ 79.6 (\
9)
Crankshaft Position (CKP) Sensor ........................ 79.6 (9\
)
( 1) - Tighten cylinder head bolts in 2 or 3 steps with engine cold.
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ENGINE SPECIFICATIONS
GENERAL SPECIFICATIONS
GENERAL SPECIFICATIONS\
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Application Specification
Displacement .................................. 213.4 Cu. In. (3.5L)\
Bore ............................................... 3.6614" (93 mm)\
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ABBREVIATION DEFINITION
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B/P Backpressure
BAC By-Pass Air Control
BAP Barometric Absolute Pressure Sensor
BARO Barometric
BBDC Before Bottom Dead Center
BCM Body Control Module
BDC Bottom Dead Center
BHP Brake Horsepower
BLK Black
BLU Blue
BMAP Barometric & Manifold Absolute Pressure Sensor
BOO Brake On-Off Switch
BP Barometric Pressure sensor
BPS Barometric Pressure Sensor
BPT Backpressure Transducer
BRN Brown
BTDC Before Top Dead Center
BTU British Thermal Unit
BVSV Bimetallic Vacuum Switching Valve
Baro. Barometric
Batt. Battery
Bbl. Barrel (Example: 4-Bbl.)
Blst. Ballast
Blwr. Blower
Brkr. Breaker
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"C" ABBREVIATION TABLE
"C" ABBREVIATION TABLE \
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ABBREVIATION DEFINITION
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C Celsius (Degrees)
C(3) I Computer Controlled Coil Ignition
C(4) Computer Controlled Catalytic Converter
CANP Canister Purge solenoid
CARB California Air Resources Board
CAT Catalytic Converter
CB Circuit Breaker
CBD Closed Bowl Distributor
CBVV Carburetor Bowl Vent Valve
cc Cubic Centimeter
CCC Computer Command Control
CCD Computer Controlled Dwell
CCM Central Control Module
CCO Converter Clutch Override
CCOT Cycling Clutch Orifice Tube
CCW Counterclockwise
CDI Capacitor Discharge Ignition
CEC Computerized Engine Control
CFI Central Fuel Injection
CID Cubic Inch Displacement
CID Cylinder Identification sensor
CIS Continuous Injection System
CIS-E Continuous Injection System-Electronic
CKT Circuit
CLR Clear
CNG Compressed Natural Gas
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EAC Electric Assist Choke")
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EAC Electric Assist Choke
EACV Electric Air Control Valve
EBCM Electronic Brake Control Module
ECA Electronic Control Assembly
ECAT Electronically Controlled Automatic Transaxle
ECM Electronic Control Module
ECT Engine Coolant Temperature Sensor
ECU Electronic Control Unit or Engine Control Unit
EDF Electric Drive Fan relay assembly
EDIS Electronic Distributorless Ignition System
EEC Electronic Engine Control
EECS Evaporative Emission Control System
EEPROM Electronically Erasable PROM
EFE Early Fuel Evaporation
EFI Electronic Fuel Injection
EGO Exhaust Gas Oxygen sensor (see HEGO)
EGR Exhaust Gas Recirculation system
EGRC EGR Control solenoid or system
EGRV EGR Vent solenoid or system
EMR Emission Maintenance Reminder Module
ESA Electronic Spark Advance
ESC Electronic Spark Control
EST Electronic Spark Timing
ETR Emergency Tensioning Retractor
EVAP Fuel Evaporative System
EVIC Electronic Vehicle Information Center
EVO Electronic Variable Orifice
EVP EGR Valve Position Sensor
EVR EGR Valve Regulator
EVRV Electronic Vacuum Regulator Valve
Elect. Electronic
Eng. Engine
Evap. Evaporative
Exc. Except
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"F" ABBREVIATION TABLE
"F" ABBREVIATION TABLE \
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ABBREVIATION DEFINITION
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F Fahrenheit (Degrees)
F/B Fuse Block
FBC Feedback Carburetor
FI Fuel Injector or Fuel Injection
FICD Fast Idle Control Device
FIPL Fuel Injector Pump Lever
FP Fuel Pump
FPM Fuel Pump Monitor
FPR-VSV Fuel Pressure Regulator Vacuum Switching Valve
FWD Front Wheel Drive
Fed. Federal
Ft. Lbs. Foot Pounds
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"G" ABBREVIATION TABLE
"G" ABBREVIATION TABLE \
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ABBREVIATION DEFINITION
Page 31 of 1501
mm Millimeters
M/T Manual Transaxle or Transmission
MA PFI Mass Air Sequential Port Fuel Injection system
MA or MAF Mass Airflow
MAF Mass Air Flow sensor
MAFS Mass Airflow Sensor
MAP Manifold Absolute Pressure sensor
MAT Manifold Air Temperature
MCU Microprocessor Control Unit
MCV Mixture Control Valve
MEM-CAL Memory Calibration Chip
MFI Multiport Fuel Injection
MIL Malfunction Indicator Light
MLP Manual Lever Position
MPFI Multi Point Fuel Injection
MPH Miles Per Hour
MPI Multi-Point (Fuel) Injection
Man. Manual
Mech. Mechanical
Mem. Memory
Mtr. Motor
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"N" ABBREVIATION TABLE
"N" ABBREVIATION TABLE \
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ABBREVIATION DEFINITION
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N.m Newton-Meter
NA Not Available
NDS Neutral Drive Switch
NGS Neutral Gear Switch
NOx Oxides of Nitrogen
NPS Neutral Pressure Switch
No. Number
Nos. Numbers
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"O" ABBREVIATION TABLE
"O" ABBREVIATION TABLE \
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ABBREVIATION DEFINITION
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O Oxygen
O.D. Outside Diameter
O/S Oversize
O2 Oxygen
OC Oxidation Catalyst
OCC Output Circuit Check
OD Overdrive
ODO Odometer
OHC Overhead Camshaft
ORG Orange
OSC Output State Check
Opt. Option or Optional
oz. Ounce
ozs. Ounces
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![MITSUBISHI MONTERO 1998 Service Manual "P" ABBREVIATION TABLE
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"P" ABBREVIATION TABLE
"P" ABBREVIATION TABLE \
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"P" Park
P/C Printed Circuit
P/N Park/Neutral
P/S Power Steering
PAV Pulse Air Valve
PC-SOL Purge Control Solenoid
PCM Powertrain Control Module
PCS Purge Control Solenoid
PCSDM Passenger Compartment Sensor/Diagnostic Module
PCV Positive Crankcase Ventilation
PFE Pressure Feedback EGR sensor or circuit
PFI Port Fuel Injection (see MA SEFI)
PGM-CARB Programmed Carburetor
PGM-FI Programmed Fuel Injection
PIP Profile Ignition Pickup
PNK Pink
PPL Purple
PRNDL Park Reverse Neutral Drive Low
PROM Programmable Read-Only Memory
psi Pounds Per Square Inch
PSPS Power Steering Pressure Switch
PTC Positive Temperature Coefficient
PTO Power Take-Off
PWR GND Power Ground circuit
Pkg. Package
Press. Pressure
Prog. Programmed or Programmable
Pts. Pints
Pwr. Power
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"Q" ABBREVIATION TABLE
"Q" ABBREVIATION TABLE \
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Qts. Quarts
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"R" ABBREVIATION TABLE
"R" ABBREVIATION TABLE \
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RABS Rear Anti-Lock Brake System
RAC Remote Accessory Control
RAM Random Access Memory
RAP Retained Accessory Power
RECIRC Recirculation
RED Red
RH Right Hand
ROM Read Only Memory
RPM Revolutions Per Minute
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Application ( 1) Basic ( 2) ( 3) ( 4) Actual")
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Application ( 1) Basic ( 2) ( 3) ( 4) Actual
1.5L ............. 2-78@ 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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FUEL SYSTEM
FUEL PUMP
REGULATED FUEL PRESSURE TABLE \
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At Idle w/Vacuum At Idle w/o Vacuum
Application psi (kg/cm) psi (kg/cm)
Eclipse 2.0L
Non-Turbo ............ ( 1) ........... 47-50 (3.3-3.5)
Turbo ............. 33 (2.3) ......... 42-45 (3.0-3.5)
3000GT Turbo ........ 34 (2.4) ......... 43-45 (3.0-3.1)
All Other Models .... 38 (2.7) ......... 47-50 (3.3-3.5)
( 1) - Information is not available from manufacturer at time
of publication.
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IDLE SPEED
IDLE SPEED SPECIFICATIONS TABLE \
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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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INJECTOR RESISTANCE
INJECTOR RESISTANCE TABLE
Page 455 of 1501
E - THEORY/OPERATION
1998 Mitsubishi Montero
1998 ENGINE PERFORMANCE
Mitsubishi - Theory & Operation
Diamante, Eclipse, Galant, Mirage, Montero, Montero Sport,
3000GT
INTRODUCTION
This article covers basic description and operation of engine
performance-related systems and components. Read this article before
diagnosing vehicles or systems with which you are not completely
familiar.
AIR INDUCTION SYSTEM
NON-TURBOCHARGED ENGINES
Mirage equipped with 1.5L engine uses a Manifold Absolute
Pressure (MAP) sensor instead of a Volume Airflow (VAF) sensor.
Filtered air is ducted to a plenum-mounted throttle body.
All other models use same basic air induction system using a
remote air filter (with VAF sensor) connected to a plenum-mounted
throttle body.
TURBOCHARGED ENGINES
In addition to basic air induction system, turbocharging
system components include turbocharger(s), charge air cooler(s), air\
by-pass valve(s), wastegate actuator(s), wastegate control solenoid
valve(s) and intake duct(s).
Wastegate Control Solenoid Valve(s)
Powertrain Control Module (PCM) energizes solenoid valve(s)\
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controlling bleed-off rate of turbocharger pressure by wastegate
actuator(s).
COMPUTERIZED ENGINE CONTROLS
Sequential Fuel Injection (SFI) is a computerized engine
control system, which controls fuel injection, ignition timing, idle
speed and emission control systems.
POWERTRAIN CONTROL MODULE (PCM)
PCM, also known as Engine Control Module (ECM), receives and
processes signals from input devices. Operating conditions such as
cold starting, altitude, acceleration and deceleration affect input
device signals. Based on signals received, PCM sends signals to
various components, which control fuel injection, ignition timing,
idle speed and emission control systems. For PCM location, see
PCM LOCATION table.
PCM LOCATION TABLE
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Application Location
Eclipse 2.0L Non-Turbo .......... In Front of Left Front Strut Tower
Page 456 of 1501
![MITSUBISHI MONTERO 1998 Service Manual Mirage &
Montero Sport ... Behind Right Side Of Instrument Panel (Glove Box)\
Montero ..................................... Right Front Kick Panel
All Others ...................................](/img/19/57333/w960_57333-455.png "MITSUBISHI MONTERO 1998 Service Manual Mirage &
Montero Sport ... Behind Right Side Of Instrument Panel (Glove Box)\
Montero ..................................... Right Front Kick Panel
All Others ...................................")
Mirage &
Montero Sport ... Behind Right Side Of Instrument Panel (Glove Box)\
Montero ..................................... Right Front Kick Panel
All Others ................................... Behind Center Console
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NOTE: Components are grouped into 2 categories. The first category
covers INPUT DEVICES, which control or produce voltage
signals monitored by Powertrain Control Module (PCM). The
second category covers OUTPUT SIGNALS, which are components
controlled by PCM.
INPUT DEVICES
Vehicles are equipped with different combinations of input
devices. Not all input devices are used on all models. To determine
input device usage on specific models, see appropriate wiring diagram
in L - WIRING DIAGRAMS article. The following are available input
devices.
Air Conditioning Switch
When A/C is turned on, signal is sent to PCM. With engine at
idle, PCM increases idle speed through Idle Air Control (IAC) motor.
Airflow Sensor Assembly
Assembly is mounted inside air cleaner, and incorporates
barometric pressure sensor, intake air temperature sensor and volume
airflow sensor.
Barometric (BARO) Pressure Sensor
Sensor is incorporated into airflow sensor assembly. Sensor
converts barometric pressure to electrical signal, which is sent to
PCM. PCM adjusts air/fuel ratio and ignition timing according to
altitude.
Camshaft Position (CMP) Sensor
On SOHC engines equipped with a distributor, CMP sensor is
located in distributor. On Eclipse (Turbo) and DOHC V6 engines, sensor\
is located beside camshaft, in front of engine. On all other engines,
CMP sensor is a separate unit mounted in place of distributor. PCM
determines TDC based on pulse signals received from sensor, and then
controls MFI timing.
Closed Throttle Position (CTP) Switch
CTP switch is located in the Throttle Position (TP) sensor.
PCM senses whether accelerator pedal is depressed or not. High voltage
(open) or low voltage (closed) signal is input to PCM, which then
controls Idle Air Control (IAC) motor based on input signal.
Crankshaft Position (CKP) Sensor
CKP sensor is located in distributor on SOHC engines, except
1.5L 4-cylinder with California emissions. On DOHC 4-cylinder, DOHC V6
and 1.5L 4-cylinder engines with California emissions, CKP sensor is
located beside crankshaft, in front of engine. PCM determines
crankshaft position on pulse signals received from sensor, and then
controls MFI timing and ignition timing.
Engine Coolant Temperature (ECT) Sensor
ECT sensor converts coolant temperature to electrical signal
for use by PCM. PCM uses coolant temperature information to control
fuel enrichment when engine is cold.
Heated Oxygen Sensor (HO2S)
Page 457 of 1501
HO2S detects oxygen content in exhaust gas and sends this
information to PCM. PCM uses input signals from HO2S to vary duration
of fuel injection. HO2S heater stabilizes sensor temperature
regardless of exhaust gas temperature to allow for more accurate
exhaust oxygen content readings.
Idle Air Control (IAC) Valve Position Sensor
Sensor is incorporated in IAC motor. Sensor senses IAC motor
plunger position and sends electrical signal to PCM.
Ignition Timing Adjustment Terminal
Used for adjusting base ignition timing. When terminal is
grounded, PCM timing control function is by-passed, allowing base
timing to be adjusted.
Intake Air Temperature (IAT) Sensor
IAT sensor is incorporated into airflow sensor assembly. This
resistor-based sensor measures temperature of incoming air and
supplies air density information to PCM.
Knock Sensor (KS)
KS is located in cylinder block and senses engine vibration
during detonation (knock). KS converts vibration into electrical
signal. PCM retards ignition timing based on this signal.
Manifold Differential Pressure (MDP) Sensor
MDP sensor converts negative air pressure in intake manifold
plenum into voltage signals sent to PCM. PCM monitors Exhaust Gas
Recirculation (EGR) system using these signals.
Park/Neutral Position (PNP) Switch (Automatic Transmission)
PNP switch senses position of transmission select lever,
indicating engine load due to automatic transmission engagement. Based
on this signal, PCM commands IAC motor to increase throttle angle,
maintaining optimum idle speed.
Power Steering Oil Pressure Switch
Switch detects increase in power steering oil pressure. When
power steering oil pressure increases, switch contacts close,
signaling PCM. PCM commands IAC motor, raising idle speed to
compensate for drop in engine RPM due to power steering load.
Throttle Position (TP) Sensor
TP sensor is a variable resistor mounted on throttle body.
PCM uses voltage signal from TP sensor to determine throttle plate
angle.
Vehicle Speed Sensor (VSS)
Mounted on transaxle/transmission, VSS sends a pulsing signal
to PCM for vehicle speed calculation. PCM uses this calculation for
cruise control and fuel cut-off.
Volume Airflow (VAF) Sensor
Incorporated into airflow sensor assembly, VAF sensor
measures intake airflow rate. Intake air flows through tunnel in
airflow sensor assembly. VAF sensor sends frequency signal to PCM. PCM
uses signal to adjust fuel injection rate.
OUTPUT SIGNALS
NOTE: Vehicles are equipped with various combinations of
computer-controlled components. Not all components listed
below are used on every vehicle. To determine component
Page 458 of 1501
usage on specific models, see appropriate wiring diagram in
L - WIRING DIAGRAMS article. For theory and operation on each
output component, refer to system indicated after component.
Data Link Connector (DLC)
See SELF-DIAGNOSTIC SYSTEM .
EGR Control Solenoid Valve
See EXHAUST GAS RECIRCULATION (EGR) CONTROL under EMISSION
SYSTEMS.
Fuel Injectors
See FUEL CONTROL under FUEL SYSTEM.
Fuel Pressure Control Solenoid Valve (Turbo)
See FUEL DELIVERY under FUEL SYSTEM.
Fuel Pressure Regulator
See FUEL DELIVERY under FUEL SYSTEM.
Idle Air Control (IAC) Motor
See IDLE SPEED under FUEL SYSTEM.
Malfunction Indicator Light
See SELF-DIAGNOSTIC SYSTEM .
Power Transistor(s) & Ignition Coils
See IGNITION SYSTEMS .
Purge Control Solenoid Valve
See EVAPORATIVE CONTROL under EMISSION SYSTEMS.
Wastegate Control Solenoid Valve
See TURBOCHARGED ENGINES under AIR INDUCTION SYSTEM.
FUEL SYSTEM
FUEL DELIVERY
Electric fuel pump, located in gas tank, feeds fuel through
in-tank fuel filter, external fuel filter (located in engine
compartment) and fuel injector rail.
Fuel Pump
Fuel pump consists of a motor-driven impeller. Pump has an
internal check valve to maintain system pressure, and a relief valve
to protect fuel pressure circuit. Pump receives voltage supply from
MFI control relay.
Fuel Pressure Control Solenoid Valve (Turbo)
Valve prevents rough idle due to fuel percolation. On engine
restart, if engine coolant or intake air temperature reaches a preset
value, PCM applies voltage to fuel pressure control solenoid valve for
2 minutes after enginerestart. Valve will open, allowing atmospheric
pressure to be applied to fuel pressure regulator diaphragm. This
allows maximum available fuel pressure at injectors, enriching fuel
mixture and maintaining stable idle at high engine temperatures.
Fuel Pressure Regulator
Located on fuel injector rail, this diaphragm-operated relief
valve adjusts fuel pressure according to engine manifold vacuum.
As engine manifold vacuum increases (closed throttle), fuel