ignition MITSUBISHI LANCER EVOLUTION VIII 2004 Workshop Manual

11ENGINE (4G6) – GENERAL
SECTION 1
ENGINE (4G6)
CONTENTS
General ....................................................11
1. Major Specifications ....................................11
2. Engine Performance Curve.........................12
Base Engine (6 M/T) ...............................12
1. Cylinder head gasket...................................12
2. Pistons ..........................................................13
3. Piston rings (2nd) ........................................134. Oil rings ........................................................14
5. Counterbalance shaft .................................14
6. Camshaft.......................................................15
Intake / Exhaust System (6 M/T)............16
1. Exhaust system ...........................................16
Control system (6 M/T) ...........................18
1. Supercharging pressure control ..............110
General
The 4G63T/C engine fitted in the Lancer Evolution VIII MR is basically the same as the 4G63T/C engine used in the Lancer
Evolution VIII.
The basic structure is the same in both the 6M/T (6speed) and 5M/T (5speed) versions, but the following improvements have
been made to the 6M/T version, in order to achieve higher performance.
• Adoption of 5ply cylinder head gasket
• Addition of Vshaped groove in piston , and modified shape in cooling channel
• Reduced oil consumption by increasing tension in piston rings and reducing endtoend gap
•Extra durability and reduced oil consumption by using new treatment on outer surface of oil ring side rail, and altering
thickness
•Lighter counterbalance shaft
• Increased output at high engine speeds by modifying intake cams
Major Specifications
Item 6 M/T5M/T
Total Displacement cc1997
Combustion chamberPentroof type
Bore x stroke (mm)85.0 x 88.0
Compression ratio8.8
Camshaft arrangementDOHC4 valve
FuelPremium unleaded
Max. output (kW/rpm)206/6500
Max. torque (Nm/rpm)400/3500392/3500
Fuel systemElectronic controlled multipoint fuel injection
Ignition systemElectronic controlled twocoil
Lash adjusterEquipped

ENGINE (4G6) – GENERAL, BASE ENGINE (6 M/T)18
Control system (6M/T)
The following changes have been made, based on the control system in the 4G63DOHCT/C engine fitted in the current
Lancer Evolution VIII.
* Addition of wastegate solenoid valve (1 valve –> 2 valves)
System Block Diagram
Air flow sensor (AFS)
Air temperature sensor
Atmospheric pressure sensor
Water temperature sensor
Throttle position sensor (TPS)
A/C switch
A/C load signal
Cam position sensor
Crank angle sensor
Alternator FR terminal
Vehicle speed sensor
Power steering fluid pressure
switch
Knock sensor
Intercooler water spray (auto)
Intercooler water spray (manual)
O
2sensor
Ignition switch –IG
Ignition switch –STPower supplyEngine ECU
Fuel injection control
Idle speed control (ISC)
Ignition timing control
Engine control relay control
Fuel pump relay control
A/C relay control
Fan motor control (radiator)
Fan relay control (A/C
condenser)
Alternator control
Air flow sensor filter reset
control
Fuel pressure control
Supercharging pressure
control
Secondary air controlIntercooler water spay control
Engine warning light control
O
2sensor heater control
Purge control
Diagnosis output
RAM data transmissionNo. 1 indicator
No. 2 indicator
No. 3 indicatorNo. 4 indicator
ISC servo (stepper motor)
Ignition coil A (No.1 – No.4)
Ignition coil B (No.2 – No.3)
Engine control relay
Fuel pump relay 2
Fuel pump relay 3
A/C relay
Fan controller (radiator fan)
Fan motor relay (HI, LOW)
(A/C condenser)
Alternator G terminal
Air flow sensor
Fuel pressure control valve
No. 1 wastegate solenoid valve
No. 2 wastegate solenoid valve
Secondary air control solenoid
valve
Intercooler water spray relay
Intercooler water spray lamp
Tachometer
Engine warning lights O
2sensor heater
Purge control solenoid valve
Diagnosis output terminal
Diagnosis output terminal (for
MUTII)

ENGINE (4G6) – GENERAL, BASE ENGINE (6 M/T)19
1. O2 sensor2. Air flow sensor3. Air intake sensor4. Throttle position
sensor
5. Cam position sensor6. Crack angle sensor7. Atmospheric pressure
sensor
8. Water temperature
sensor
9. Knock sensor•Power supply
• Ignition switch IG
•Ignition switch ST
•Vehicle speed sensor
• A/C switch
1. Injector2. ISC servo (stepper
motor)
3. Fuel pressure control
solenoid valve
4. No.1 wastegate solenoid
valve
5. No.2 wastegate solenoid
valve
6. Purge control solenoid
valve
7. Secondary air control
solenoid valve•Engine control relay
•Fuel pump relay 2, 3
•A/C relay
•Ignition coil
• Fan controller
Engine ECU
6. Purge control
solenoid valveCanister
7. Secondary air
control solenoid valveFrom fuel tank
Secondary
air valveBypass
valve
1. O2sensor
3. Fuel pressure
control solenoid valve
4. Throttle
position
sensor
7. Atmospheric pressure
sensor
3. Air intake
sensor2. Air flow sensor
4. No.1
wastegate
solenoid valve
5. No.2 wastegate
solenoid valve
Only operates on 6M/TWastegate actuatorFuel pressure
regulator
1. Injector5.Cam position sensor8.Water temperature sensor
9.Knock sensor
Crack angle sensor
Catalytic converter Air
intakeCheck
valve
2. ISC servo
Vacuum
tank
From fuel
pump To fuel
tank
Control system diagram

ENGINE (4G6) – CONTROL SYSTEM (6 M/T)110
1. Supercharging pressure control
The maximum torque has been increased, compared to the 4G63DOHCT/C engine in the current Lancer Evolution VIII, by
installing an additional wastegate solenoid valve (increased from 1 to 2 valves).
By adding a parallel No.2 wastegate solenoid valve to the previous system, provides extra relief capacity for the pressure
applied to the wastegate actuator thus increasing the range of supercharging pressure..
The engine ECU raises the supercharging pressure even further, thus raising the maximum torque, by driving the No.2
wastegate solenoid valve when the engine approaches maximum torque.
The No.1 wastegate solenoid valve is essentially controlled in the same way as previously.
Air flow
sensor
Knock
sensor
Engine
ECUBatterySecondary air
control solenoidvalve
Secondary
air valve
Ignition
switch
Air
intakeBypass valveVacuum tank
Intercooler
Turbocharger
Wastegate
actu
ator No. 1
wastegate
solenoid
valve
No. 2 wastegate
solenoid valve Crank angle
sensor

REFERENCE MA
TERIAL – MAIN SPECIFICATIONS / DETAILED SPECIFICATIONS84
GHCT9AItem
SNDFZSJDFZSJGFZ
Minimum ground clearance m0.140¨¨
Max. speed (estimated) km/h180¨¨
Fuel consumption km/l (10/15 mode)9.69.7¨
Braking distance m (initial speed in
km/h) È49 (100)
[Vehicle with15" brakes]
43 (100)
[Vehicle with17" brakes]¨¨
Performance
Min. turning radius m5.9¨¨
Bore x stroke mm85.0 X 88.0¨¨
Compression ratio8.8 (Unleaded
Premium)¨¨
Max. output net [k/W r.p.m.]206 / 6500
(net)¨¨
Max. torque N•m/rpm.392 / 3500
(net)400 / 3500
(net) Ȩ
OpenBTDC 21˚BTDC 17˚
ȨIntake
ClosedABDC 59˚ABCD 63˚
Ȩ
OpenBBDC 58˚¨¨
Engine
Valve or
port timing
Exhaust
ClosedATDC 18˚¨¨
Fuel tank capacity (litres)50¨55
Type and performance of ignition
equipmentElectronic:
20˚~ 45˚¨¨
Type of spark plugsIGR7A,
IGR7AG,S22PRA7,VW22PRDA7¨¨
Battery capacity Ah34 (5), 48 (5)
or 52 (5)¨¨
Electrical
Equipment
Alternator output VA12 – 58, 90,
100 or 105¨¨
Detailed Specifications
These Detailed Specifications are based on submitted data, and may therefore differ from the actual equipment.
The
symbol indicates specifications which have changed from the previous model.

REFERENCE MA
TERIAL – MAIN EQUIPMENT, COLD CLIMATE SPECIFICATIONS88
4WD
RSGSR
Equipment
5/MT6/MT
ABSrll
SRS airbags
Fuel level
Parking brake
Charge
Brake fluid
Engine check
Warning
lights
Door not properly closed
Lighting monitor warningBuzzer
Ignition key reminder warning
lll
Fixed time
intermittentll
Variable
intermittent(speed
sensitive)l
Windscre
en wipers2 speed
Mist spray
Equip
ment
Windscreen washer (synchronized with
wiper, 4jet)
lll
4WD
RSGSR
Equipment
5/MT6/MT
Rear
windowwiper /
washerFixed time intermittent,
synchronized with (R) gearpositionl
AM/FM tuner radio + MD player
+ DVDMMCS (DVD navigation
Mitsubishi MultiCommunication
System)r
Roof aeriallll
Roof and window aerial (diversity
aerial)r
W/out audiolll
Audio
parts
6 speakers (2 DIN compatible)r*3
Digital clock
Immobiliser system
lll
Manual heater
Air conditioning kit
ll
Equip
ment
Air
conditioning
Fully automatic air
conditioningl
Notes:
*3: Brackets for an aerial and radio are installed as standard.
Cold Climate Specifications
4WD
RSGSR
Equipment
5M/T6M/T
Battery
Weather strip silicon coating
Rear seat heater duct
Cold Climate Specification label
rrr
Door mirrors with heating elementsr

MPI General13A2
General
Service information issued contains the changes noted below. Other service details remain unchanged.
• Change from one to two wastegate solenoid valves. However, the No.2 wastegate solenoid valve on the 5 M/T is not
functional.
• Diagnosis code No. P1500 changed to P0622. <6M/T>
MPI system diagram
1.O2 sensor2. Air flow sensor3. Air intake sensor4. Throttle position
sensor
5. Cam position sensor6. Crack angle sensor7.Barometric pressure
sensor
8. Water temperature
sensor
9. Knock sensor•Power supply
• Ignition switch IG
• Ignition switch ST
•Vehicle speed sensor
• A/C switch
• A/C load signal
•Power steering fluid
pressure switch
•Alternator FR signal
•Intercooler water spray
switch (auto)
•Intercooler water spray
switch (manual)
1.Injector2. ISC servo (stepper
motor)
3.Fuel pressure control
solenoid valve
4.No.1 wastegate solenoid
valve
5. No.2 wastegate solenoid
valve
6. Purge control solenoid
valve
7. Secondary air control
solenoid valve•Engine control relay
•Fuel pump relay 2, 3
• A/C relay
•Ignition coil
• Fan controller
• Condenser fan relay (HI)
•Condenser fan relay
(LOW)
•Engine warning lamp
•Diagnosis output
• Alternator G terminal
•Intercooler water spray
relay
•Intercooler water spray
lamp
Engine ECU
6.Purge control
solenoid valveCanister
7.Secondary air
control solenoid valveFrom fuel tank
Secondary
air valveBypass
valve
1. O2sensor
3.Fuel pressure
control solenoid valve
4.Throttle
position
sensor
7. Barometric pressure
sensor
3. Air intake
sensor2. Air flow sensor
4. No.1
wastegate
solenoid valve
5.No.2 wastegate
solenoid valve
Only operates on 6M/TWastegate actuatorFuel pressure
regulator
1. Injector5.Cam position sensor8.Water temperature sensor
9.Knock sensor
Crack angle sensor
Catalytic converter Air
intakeCheck
valve
2.ISC servo
Vacuum
tank
From fuel
pump To fuel
tank

MPI – Troubleshooting13A3
Connector inspection : B32
Change No.2 wastegate solenoid valve.
Check connector:B19X
Inspect, repair harness between No.2 wastegate
solenoid valve and engine control relay.
• Check for broken wire and shorting.
Check connector:C49
Replace engine ECU
Check harness between No.2 wastegate
solenoid valve and engine ECU.
• Check output wire to see if broken or shorting.
Check connector: C49
Replace engine ECU.
B32 No.2: measure at wastegate solenoid valve
connector
• Undo connector and take measurement on
solenoid valve side
• Resistance between 1 and 2
OK:29 35Ω(at 20˚C)
Measure at B32 No.2 waste gate solenoid valve
connector.
• Undo connector and take measurement on
harness side.
• Ignition switch ON:
• Resistance between 1 – earth
OK:battery voltage
Measurement at C49 engine ECU connector
•Engine ECU terminal voltage measurement
• Ignition switch: ON
• Voltage between 6 – Earth
OK:battery voltage
Check harness between No.2 wastegate
solenoid valve and engine ECU.
• Check for damage to output wire.
Check harness between No.2 wastegate
solenoid valve and engine control relay.
•Check for damage to power supply cable.
TROUBLESHOOTING
1.Inspection procedures for different types of malfunction
Inspection procedure 37
No.2 Wastegate solenoid valve system <6M/T>
The No.2 wastegate solenoid valve controls excess pressure
introduced via the turbocharger wastegate actuator.
Assumed cause of concern
• No.2 wastegate solenoid valve malfunction
• Engine ECU malfunction
Repair
Repair
Repair
Repair
OK
OK
OK
OK
OK
OK
OK
NG
NG
NG
NG
NG
NG
NG
NGRepair
NGRepair
Repair
OK OK OK

MPI – TROUBLESHOOTING13A4
2.ENGINE ECU CHECKS
21 List of terminal voltages
22 List of resistances and conductance between harness side connector – terminal
Terminal No.Check itemCheck item (engine condition)Normal value
41No.1 wastegate
solenoid valveIgnition switch ONBattery voltage
Engine: warm, idling (using premium petrol)1V or less
6No.2 wastegate
solenoid valve
<6M/T>Ignition switch: ONBattery voltage
Accelerating in 2nd gear with throttle full open (at least 3500 rpm)Voltage decrease
Terminal No.Check itemStandard value, normal condition (check condition)
4147No.1 wastegate solenoid valve2935Ω(at 20˚C)
647No.2 wastegate solenoid valve <6 M/T>2935 Ω(at 20˚C)

INTAKE – EXHAUST – VEHICLE SERVICING152
1) Wastegate actuator misoperation
2) Wastegate valve misoperation3) Wastegate actuator rubber hose detachment, cracking.
2. Boost pressure control system inspection <6M/T>
Note
The driving test, which is done with the throttle fully open,
must be done in a safe place with two people in the vehicle.
The person sitting in the passenger seat should take thereading of the values on the pressure gauge.
(1) Remove hose (black) from No.1 wastegate solenoid valve, then
connect a threeway coupling between the hose and the
solenoid valve.
(2) Connect a hand vacuum pump to the threeway coupling.
(3)Remove boost hose from the wastegate actuator control boost
nipple on the air outlet fitting, and fit a plug over the nipple.
(4)Apply a vacuum whilst covering and releasing the tip of the
hose to check the vacuum condition.
(5) Ignition switch to “LOCK” (OFF) position.
(6) Remove wastegate solenoid valve connector.
(7) Apply a vacuum whilst covering and releasing the tip of the
hose, to check the vacuum condition (stop the hose tip with a
plug when driving).
Note
When vacuum condition is not normal, it may be assumed that
there is a problem with the wastegate actuator, wastegate solenoid
valve, or hose.
Engine conditionBoost hose tipNormal condition
Stop (ignition
switch:“ON”
position)ReleasedVacuum leaks
CoveredVacuum is maintained
Idle running after
warming up.Vacuum leaks
Engine conditionBoost hose tipNormal condition
Stop (ignition s
witch:
“ON” position)ReleasedV
acuum leaks
CoveredVacuum is maintained
Accelerating with
throttle full open in
2nd gear (at least
3500rpm)Vacuum leaks
Air cleaner
No.1 Wastegate
solenoid valve
No.2 Wastegate
solenoid valve
Wastegate
actuator
Boost hose