service MITSUBISHI LANCER EVOLUTION IV 1998 User Guide

ENGINE – Engine Assembly 11- 34
REMOVAL SERVICE POINTS
 A DRIVE BELT REMOVAL
(1) Align the hole in the auto tensioner bracket with that in the arm and insert a screwdriver into the holes.
(2) Remove the drive belt.
 B POWER STEERING OIL PUMP REMOVAL
Remove the power steering oil pump from the bracket with
the hose attached.
NOTE
Place the removed power steering oil pump in a place where
it will not be a hindrance when removing and installing the
engine assembly, and tie it with a cord.
 C A/C COMPRESSOR REMOVAL
Disconnect the A/C compressor connector and remove the
compressor from the compressor bracket with the hose still
attached.
NOTE
Place the removed A/C compressor where it will not be a
hindrance when removing and installing the engine assembly,
and tie it with a cord.
 D ENGINE MOUNT BRACKET REMOVAL
(1) Support the engine with a garage jack.
(2) Remove the special tools which was attached when the transmission assembly was removed.
(3) Hold the engine assembly with a chain block or similar tool.
(4) Place a garage jack against the engine oil pan with a piece of wood in between, jack up the engine so that
the weight of the engine is no longer being applied to
the engine mount bracket, and then remove the engine
mount bracket.
Phillips
screwdriver
Hole in arm
Auto tensioner
Hole in bracket
MZ203826 or MZ203827
MB991453

ENGINE – Engine Assembly11-3 5
E ENGINE ASSEMBLY REMOVAL
After checking that all cables, hoses and harness connectors,
etc., are disconnected from the engine, lift the chain block
slowly to remove the engine assembly upward from the engine
compartment.
INSTALLATION SERVICE POINTS
 A ENGINE ASSEMBLY INSTALLATION
Install the engine assembly, checking that the cables, hoses,
and harness connectors are not clamped.
 B ENGINE MOUNT BRACKET INSTALLATION
(1) Place a garage jack against the engine oil pan with a piece of wood in between, and install the engine mount
bracket while adjusting the position of the engine.
(2) Support the engine with the garage jack.
(3) Remove the chain block and support the engine assembly
with the special tools.
 C HIGH-PRESSURE FUEL HOSE INSTALLATION
(1) Apply a small amount of new engine oil to the O-ring, then fit the O-ring in the delivery pipe.
Caution
Do not let any engine oil get into the delivery pipe.
(2) Check that the high pressure hose turns smoothly. If the hose does not turn smoothly, the O-ring is probably
being clamped. Disconnect the high-pressure fuel hose
and check the O-ring for damage. After this, re-install
the hose to the delivery pipe and check that the hose
turns smoothly.
(3) Tighten the mounting bolt to the specification.
MZ203826 or MZ203827
MB991453

ENGINE LUBRICATION – Lubricants / Engine Oil Cooler12-2
TSB Revision
LUBRICANTS
ItemsCapacity dm3 {
}
Engine oilQuantity in oil filter0.3 {0.3}
Quantity in oil cooler0.16 {0.16}
Total quantity5.1 {5.1}
BrandDIA QUEEN MOTOR OIL (Grade SG or higher); or engine oil in
a can marked with ILSAC certification.
ENGINE OIL COOLER
REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operation
(1) Engine Oil Removal and Refilling
(2) Front Bumper Removal and Installation
(Refer to GROUP 51.)
3
Unit: Nm {kgfm}
12 {1.2}
39 – 44
{4.0 – 4.5} 29 – 34
{3.0 – 3.5}
2 1
39 – 44
{4.0 – 4.5} 12 {1.2}
12 {1.2}
Removal steps
1. Engine oil cooler

A2. Feed hose assembly

A3. Return hose assembly
INSTALLATION SERVICE POINT

AFEED HOSE ASSEMBLY / RETURN HOSE
ASSEMBLY INSTALLATION
Fit the hose joint positioning tab into the hole in oil cooler
to secure the hose assembly in position.

13-1
FUEL
CONTENTS
MULTIPOINT INJECTION (MPI) 2. . . . . . .
GENERAL INFORMATION 2. . . . . . . . . . . . . . . .
SERVICE SPECIFICATIONS 3. . . . . . . . . . . . . .
SEALANT 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIAL TOOLS 4. . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING 6. . . . . . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE 30. . . . . . . . . . . . . . . .
1. Idle Position Switch and Throttle Position
Sensor (TPS) Adjustment 30. . . . . . . . . . . . .
2. Fixed SAS Adjustment 30. . . . . . . . . . . . . . . .
3. Basic Idle Speed Adjustment 30. . . . . . . . . . 4. Fuel Pressure Measurement 30. . . . . . . . . . .
5. MPI System Components Layout 31. . . . . .
6. Intake Air Temperature Sensor Check 32. .
7. Engine Coolant Temperature
Sensor Check 32. . . . . . . . . . . . . . . . . . . . . . . .
8. Oxygen Sensor Check 32. . . . . . . . . . . . . . . .
9. Injector Check 34. . . . . . . . . . . . . . . . . . . . . . .
10. Resistor Check 34. . . . . . . . . . . . . . . . . . . . . . .
11. Fuel Pump Relay No.2 Check 35. . . . . . . . .
12. Fuel Pump Resistor Check 35. . . . . . . . . . . . INJECTOR 36. . . . . . . . . . . . . . . . . . . . . . . . . . . .
THROTTLE BODY 37. . . . . . . . . . . . . . . . . . . . .

MPI – Service Specifications / Sealant13-3
SERVICE SPECIFICATIONS
ItemsSpecifications
Basic ignition timing BTDC5 ± 3
Basic idle speed rpm850 ± 50
Throttle position sensor adjusting voltage mV400 – 1,000
Throttle position sensor resistance kΩ3.5 – 6.5
ISC servo coil resistance (at 20C) Ω28 – 33
Intake air temperature sensor resistance kΩAt 20C2.3 – 3.0
At 80C0.30 – 0.42
Coolant temperature sensor resistance kΩAt 20C2.1 – 2.7
At 80C0.26 – 0.36
Fuel pressure
kPa {kgf/cm2}
When vacuum hose is connected230 {2.35}
kPa {kgf/cm2}
When vacuum hose is disconnected289 – 309 {2.95 – 3.15}
Injector coil resistance Ω2 – 3
Amount of injector fuel leak drop/min1 or less
Oxygen sensor output voltage0.6 – 1.0
Fuel pressure control valve coil resistance (at 20C) Ω28 – 36
SEALANT
ItemSpecified sealant
Coolant temperature sensorDrying sealant: HELMESEAL H-1M [0110513]
NOTE:
Given in [ ] are MITSUBISHI GENUINE PART numbers.

MPI – Troubleshooting13-18
5. SERVICE DATA LIST
<EVOLUTION-IV>
Item
No.Inspection
itemInspection contentsNormal condition
11Oxygen
sensorEngine: After having been warmed
up
Air/fuel mixture is made leaner when
When at 4,000 r/min, engine is
suddenly decelerated200 mV or less
Air/fuel mixture is made leaner when
decelerating, and is made richer
when racing.
When engine is suddenly
raced600 – 1,000 mV
Engine: After having been warmed
up
The ox
ygen sensor signal is used to
Engine is idling400 mV or less
(Chan
ges)The oxygen sensor signal is used to
check the air/fuel mixture ratio, and
control condition is also checked by
the ECU.2,500 r/min
(Changes)
600 – 1,000 mV
12Air flow
sensor*
Engine coolant temperature:
8095C
Engine is idling17 – 43 Hz
sensor*80 – 95C
Lamps, electric cooling fan and
all accessories: OFF
2,500 r/min46 – 86 Hz
all accessories: OFF
Transmission: NeutralEngine is racedFrequency increases
in response to racing
13Intake air
temperature
sensor
Ignition switch: ON or with engine
runningWhen intake air temperature
is –20C–20C
sensorWhen intake air temperature
is 0C0C
When intake air temperature
is 20C20C
When intake air temperature
is 40C40C
When intake air temperature
is 80C80C
14Throttle
position
Ignition switch: ONSet to idle position300 – 1,000 mV
position
sensor
Gradually openIncreases in proportion
to throttle opening
angle
Open fully4,500 – 5,500 mV
16Power
supply
voltageIgnition switch: ONSystem voltage
18Cranking
signal Ignition switch: ONEngine: StoppedOFF
g
(ignition
switch-ST)Engine: CrankingON
NOTE
*: When the car is new (distance it travelled is less than 500 km), output frequency of the air flow sensor may
become about 10% higher.

MPI – On-vehicle Service13-30
ON-VEHICLE SERVICE
1. IDLE POSITION SWITCH AND THROTTLE
POSITION SENSOR (TPS) ADJUSTMENT
The thickness of the feeler gauge inserted between the fixed
SAS and throttle lever should be 0.45 mm.
2. FIXED SAS ADJUSTMENT
<EVOLUTION-IV>
Turn down one turn after the fixed SAS has touched the
throttle lever.
<EVOLUTION-V>
Turn down 1-1/4 turns after the fixed SAS has touched the
throttle lever.
3. BASIC IDLE SPEED ADJUSTMENT
The basic idle speed should be 850 ± 50 rpm.
4. FUEL PRESSURE MEASUREMENT
The fuel pressure gauge should be installed at the location
shown on the left.

MPI – On-vehicle Service13-31
5. MPI SYSTEM COMPONENTS LAYOUT
NameSymbolNameSymbol
A/C switchQExhaust temperature warning lampS
A/C relayHFuel pressure control valveA
Air flow sensor (with a built-in intake air temperaturesensor and barometric pressure sensor)FIgnition coil and power transistor unitLsensor and barometric pressure sensor)InjectorB
Camshaft position sensorMISC servoD
Control relay and fuel pump relayPOxygen sensorK
Coolant temperature sensorEPower steering fluid pressure switchI
Crank angle sensorJSecondary air control solenoid valveN
Detonation sensorCThrottle position sensor (with a built-in idle switch)D
Diagnosis connectorR
Engine ECUOVehicle speed sensorT
Engine warning lampSWastegate solenoid valveG

MPI – On-vehicle Service13-32
6. INTAKE AIR TEMPERATURE SENSOR
CHECK
1. Disconnect the air flow sensor connector.
2. Measure resistance between terminals 5 and 6.
Standard value:
2.3 – 3.0 kΩ (at 20C)
0.30 – 0.42 kΩ (at 80C)
3. Measure resistance while heating the sensor using a hair
drier.
Normal condition:
Temperature (C)Resistance (kΩ)
HigherSmaller
4. If the value deviates from the standard value or the
resistance remains unchanged, replace the air flow sensor
assembly.
7. ENGINE COOLANT TEMPERATURE
SENSOR CHECK
The engine coolant temperature sensor is located as shown
on the left.
Standard value:
2.1 – 2.7 kΩ (at 20C)
0.26 – 0.36 kΩ (at 80C)
8. OXYGEN SENSOR CHECK
<EVOLUTION-IV>
The sensor connector is located as shown on the left.
<EVOLUTION-V>
(1) Disconnect the oxygen sensor connector and connect
the special tool (Test Harness: MD998464) to the oxygen
sensor connector.
Equipment sideconnector
Air flow sensor
Intake air temperature sensor
Engine coolant
temperature sensor
Oxygen sensor equipment side connector
Oxygen sensor connector
Oxygen sensor

MPI – On-vehicle Service13-33
(2) Check that there is continuity (11 to 18 Ω at 20C) across
terminal no. 1 (special tool red clip) and terminal no. 3
(special tool blue clip) of the oxygen sensor connector.
(3) If there is no continuity, replace the oxygen sensor.
(4) Run the engine until the engine coolant temperature
exceeds 80C.
(5) Using jumper wires, connect oxygen sensor terminal no.
1 (special tool red clip) and terminal no. 3 (special tool
blue clip) to battery (+) and (–) terminal, respectively.
Caution
Make sure of the correct connections: if a wrong
connection is made, a broken oxygen sensor results.
(6) Connect a digital voltmeter between terminal no. 2 (special
tool black clip) and terminal no. 4 (special tool white clip).
(7) Race the engine repeatedly to measure the oxygen sensor
output voltage.
Standard value:
EngineOxygen sensor
output voltageNOTE
When
engine is
raced0.6 – 1.0 VWhen engine racing is
repeated to enrich air-fuel
ratio, an operational oxygen
sensor should output a volt-
age of 0.6 to 1.0 V.
NOTE
Use the same procedures to remove and install the oxygen
sensor.
Red clip
Blue clip
MD998464
Red clip
Blue clip
MD998464 Black clip
White clip