MITSUBISHI LANCER EVOLUTION 2007 Service Repair Manual

17-1
ENGINE AND
EMISSION
CONTROL
CONTENTS
ENGINE CONTROL SYSTEM 2.........
GENERAL INFORMATION 2................
SERVICE SPECIFICATIONS 2...............
ON-VEHICLE SERVICE 2...................
Accelerator Cable Check and
Adjustment 2................................
ACCELERATOR CABLE AND PEDAL 3......
EMISSION CONTROL SYSTEM 4......
GENERAL INFORMATION 4................
Emission Control Device Reference
Table 4.....................................
SERVICE SPECIFICATIONS 5..............
VACUUM HOSE 5..........................
Vacuum Hose Piping Diagram 5..............
Vacuum Circuit Diagram 6....................
Vacuum Hose Check 7......................
Vacuum Hose Installation 7..................
CRANKCASE EMISSION CONTROL
SYSTEM 8................................
General Information 8........................
System Diagram 8..........................
Component Location 9.......................
Positive Crankcase Ventilation System Check 9....
PCV Valve Check 9.........................
EVAPORATIVE EMISSION CONTROL
SYSTEM 10...............................
General Information 10.......................
System Diagram 10..........................
Component Location 10......................
Purge Control System Check 11...............
Purge Port Vacuum Check 11.................
Purge Control Solenoid Valve Check 12.........
Check Valve Check 12.......................
EXHAUST GAS RECIRCULATION (EGR)
SYSTEM 13...............................
General Information 13.......................
Operation 13................................
System Diagram 13..........................
Component Location 14......................
Exhaust Gas Recirculation (EGR) Control System
Check 14...................................
EGR Valve Check 15.........................
EGR Port Vacuum Check 15..................
EGR Control Solenoid Valve Check 16..........
EGR VALVE 17............................
CANISTER 18.............................
CATALYTIC CONVERTER 19................
General Information 19.......................

ENGINE AND EMISSION CONTROL -Engine Control System17-2
ENGINE CONTROL SYSTEM
GENERAL INFORMATION
A cable-type accelerator mechanism and a
suspended-type pedal have been adopted.
SERVICE SPECIFICATIONS
ItemsStandard value
Accelerator cable play mm1-2
Engineidlespeedr/min850±50Engineidle speed±/min850±50
ON-VEHICLE SERVICE
ACCELERATOR CABLE CHECK AND
ADJUSTMENT
1. Turn A/C and lamps OFF.
Inspect and adjust at no load.
2. Warm engine until stabilized at idle.
3. Confirm idle speed is at prescribed value.
Standard value: 850±50 r/min
4. Stop engine (ignition switch OFF).
5. Confirm there are no sharp bends in accelerator cable.
6. Check inner cable for correct slack.
Standard value: 1 - 2 mm
7. If there is too much slack or no slack, adjust play by
the following procedures.
(1) Loosen the adjusting bolt to release the cable.
(2) Move the plate until the inner cable play is at the
standard value, and then tighten the adjusting bolt
to the specified torque.
Tightening torque: 5.0±1.0 N·m
plate
Adjusting bolt

ENGINE AND EMISSION CONTROL -Engine Control System17-3
ACCELERATOR CABLE AND PEDAL
REMOVAL AND INSTALLATION
Post-installation Operation
Accelerator Cable Adjustment (Refer to P.17-2.)
1
2
122 4


6 5
7
5
3
46
71
3
99
8 10
118 10
11
12
5.0±1.0N·m
5.0±1.0N·m
12±2N·m12±2N·m 10±2N·m
6
6
Accelerator pedal removal steps
1. Accelerator cable assembly connec-
tion (Accelerator pedal side)
2. Accelerator pedal assembly
3. Pedal pad
4. Push-on spring nut
5. Accelerator arm assembly
6. Bushing
7. Spring
8. Stopper
9. Accelerator pedal bracketAccelerator cable removal steps
1. Accelerator cable assembly
(Accelerator pedal side)
10. Accelerator cable assembly connec-
tion (Throttle body side)
11. Accelerator cable assembly
Accelerator pedal stopper removal
12. Accelerator pedal stopper

ENGINE AND EMISSION CONTROL -Emission Control System17-4
EMISSION CONTROL SYSTEM
GENERAL INFORMATION
The emission control system consists of the following subsystems:
DCrankcase emission control system
DEvaporative emission control system
DExhaust emission control system
ItemsNameSpecification
Crankcase emission
control systemPositive crankcase ventilation (PCV) valveVariable flow type
(Purpose: HC reduction)
Evaporative emission
control systemCanister
Purge control solenoid valve
Check valveEquipped
Duty cycle type solenoid valve
Equipped
(Purpose: HC reduction)
Exhaust emission
control systemAir-fuel ratio control device - MPI systemOxygen sensor feedback type
(Purpose: CO, HC, NOx reduction)
Exhaust gas recirculation system
DEGR valve
DEGR control solenoid valveEquipped
Single type
Duty cycle type solenoid valve
(Purpose: NOx reduction)
Catalytic converterMonolith type
(Purpose: CO, HC, NOx reduction)
EMISSION CONTROL DEVICE REFERENCE TABLE
Related partsCrankcase
emission
control
systemEvaporative
emission
control
systemAir/fuel
ratio
control
systemCatalytic
converterExhaust
gas
recirculation
systemReference
page
PCV valve×17-9
Purge control solenoid valve×17-12
Check valve×17-12
MPI system component××GROUP 13A
Catalytic converter×17-19
EGR valve×17-15
EGR control solenoid valve×17-16

ENGINE AND EMISSION CONTROL -Emission Control System17-5
SERVICE SPECIFICATIONS
ItemsStandard value
Purge control solenoid valve coil resistance (at 20_C)Ω30 - 34
EGR control solenoid valve coil resistance (at 20_C)Ω29 - 35
VACUUM HOSE
VACUUM HOSE PIPING DIAGRAM
Fuel
pressure
control
solenoid
valve
Oxygen
sensor
(front)
Check
valve
Fuel
pressure
regulator
PCV valve To
fuel tank
Oxygen sensor (rear) From
fuel pump
Air
inletEGR control
solenoid valve
Purge
control
solenoid
valveCanisterFrom
fuel tank
EGR
valve Injector
Three - way
catalytic converter A
P
E

ENGINE AND EMISSION CONTROL -Emission Control System17-6
VACUUM CIRCUIT DIAGRAM
Vacuum hose colour
B: Black
G: Green
L: Light blue
R: Red
W: White
Y: YellowFrom air
cleaner
Intake manifoldThrottle body
To
combustion
chamber
Fuel pressure
regulator
EGR control
solenoid valve
Canister
EGR valve
Brown
Check valve Vacuum
tank
Fuel pressure
solenoid valve
Air by-pass valve
Secondary air control
solenoid valve
Secondary air
control valvePurge control
solenoid valve
Air cleaner
Waste gate
solenoid valveWaste gate
actuator

ENGINE AND EMISSION CONTROL -Emission Control System17-7
VACUUM HOSE CHECK
1. Using the piping diagram as a guide, check to be sure
that the vacuum hoses are correctly connected.
2. Check the connection condition of the vacuum hoses,
(removed, loose, etc.) and check to be sure that there
are no bends or damage.
VACUUM HOSE INSTALLATION
1. When connecting the vacuum hoses, they should be
securely inserted onto the nipples.
2. Connect the hoses correctly, using the vacuum hose piping
diagram as a guide.

ENGINE AND EMISSION CONTROL -Emission Control System17-8
CRANKCASE EMISSION CONTROL SYSTEM
GENERAL INFORMATION
The crankcase emission control system prevents
blow-by gases from escaping inside the crankcase
into the atmosphere.
Fresh air is sent from the air cleaner into the
crankcase through the breather hose. The air
becomes mixed with the blow-by gases inside the
crankcase.
The blow-by gas inside the crankcase is drawn
into the intake manifold through the positivecrankcase ventilation (PCV) valve.
The PCV valve lifts the plunger according to the
intake manifold vacuum so as to regulate the flow
of blow-by gas properly. In other words, the blow-by
gas flow is regulated during low load engine
operation to maintain engine stability, while the flow
is increased during high load operation to improve
the ventilation performance.
SYSTEM DIAGRAM
Ventilation hose
PCV valve Breather hose

ENGINE AND EMISSION CONTROL -Emission Control System
PCV valve
17-9
COMPONENT LOCATION
POSITIVE CRANKCASE VENTILATION SYSTEM
CHECK
1. Remove the ventilation hose from the PCV valve.
2. Remove the PCV valve from the rocker cover.
3. Reinstall the PCV valve at the ventilation hose.
4. Start the engine and run at idle.
5. Place a finger at the opening of the PCV valve and check
that vacuum of the intake manifold is felt.
NOTE
At this moment, the plunger in the PCV valve moves
back and forth.
6. If vacuum is not felt, clean the PCV valve or replace
it.
PCV VALVE CHECK
1. Insert a thin rod into the PCV valve from the side shown
in the illustration (rocker cover installation side), and move
the rod back and forth to check that the plunger moves.
2. If the plunger does not move, there is a clogging in the
PCV valve. In this case, clean or replace the PCV valve.
PCV valve
PCV valve

ENGINE AND EMISSION CONTROL -Emission Control System
Vacuum tank
Alternator
Purge control solenoid valve
17-10
EVAPORATIVE EMISSION CONTROL SYSTEM
GENERAL INFORMATION
The evaporative emission control system prevents
fuel vapours generated in the fuel tank from
escaping into the atmosphere.
Fuel vapours from the fuel tank flow through the
fuel tank pressure control valve and vapour
pipe/hose to be stored temporarily in the canister.
When driving the vehicle, fuel vapours stored in
the canister flow through the purge solenoid and
purge port and go into the intake manifold to be
sent to the combustion chamber.When the engine coolant temperature is low or
when the intake air quantity is small (when the
engine is at idle, for example), the engine control
unit turns the purge solenoid off to shut off the
fuel vapour flow to the intake manifold.
This does not only insure the driveability when the
engine is cold or running under low load but also
stabilize the emission level.
SYSTEM DIAGRAM
BatteryIntake air
temperature sensor
Barometric pressure
sensor
Check
valve
Canister
Control
relay
Purge control
solenoid valve
(ON: Open)
Engine-ECUEngine coolant
temperature sensor Air flow sensor
COMPONENT LOCATION