2006 MITSUBISHI LANCER exhaust

EXHAUST PIPE AND MAIN MUFFLER
INTAKE AND EXHAUST15-10
REMOVAL SERVICE POINT
<> ENGINE CONTROL OXYGEN SEN-
SOR (FRONT) REMOVAL
AC212566AC
MD998770
Engine control
oxygen sensor
(front)
Use spe c ia l tool oxyg en sen s or wrench (MD9987 70)
to remove t
he eng ine contro l oxygen sen s or (fro nt).
INSTALLA T ION SER VICE POINT
>>A<< ENGINE CONT ROL OXYGEN SEN-
SOR (FRONT) INSTALLA TION
AC212566AC
MD998770
Engine control
oxygen sensor
(front)
Use spe c ia l tool oxyg en sen s or wrench (MD9987 70)
to inst
all the eng ine contro l oxyge n sen s or (f ront).
INSPECTIONM1151 0034 0054 3
Chec k the fo llowing point s; rep l ace the p a rt if a p r ob-
lem is found.
Exhaust Manifold Check
1.Check f o r damage o r cracking of a n y p a rt.
2.Using a straight e dge an d a fee l er ga uge, check
fo r distortio n of th e cylin der he ad in st allation
surface.
St a ndard val ue: 0.15 mm or les s
Limit: 0.20 mm
EXHAUST PIPE AND MAI N MUFFLER
REMOVA L AND INST ALLA TION
M1151 0087 0096 9
AC303694AC
1
3
50 ± 10 N·m
2
7
N
N
45
8 4
N9
10
59 ± 10 N·m
45 ± 5 N·m
13 ± 2 N·m
45 ± 5 N·m
13 ± 2 N·m
10
<4G1>

AC303695AC
1
3
50 ± 10 N·m
2
7
N
N
45
8 4
N9
10
59 ± 10 N·m
45 ± 5 N·m
13 ± 2 N·m
45 ± 5 N·m
13 ± 2 N·m
10
<4G6-M/T>
AC504798AB
<4G6-A/T> 1
2
3N
4
7N8
N9
10
13 ± 2 N·m
13 ± 2 N·m
45 ± 5 N·m
59 ± 10 N·m
6N
10
4
50 ± 10 N·m
13 ± 2 N·m
13 ± 2 N·m
50 ± 10 N·m
Exhaust main muffler removal
steps

1.Exhaust main muffler
3.Exhaust pipe gasket
4.Exhaust muffler hanger
Centre exhaust pipe removal
steps

2.Centre exhaust pipe
3.Exhaust pipe gasket
6.Exhaust pipe gasket <4G6-A/T>
8.Exhaust pipe gasket <4G1,
4G6-M/T>
Front exhaust pipe removal
steps

<>>>A<<5.Engine control oxygen sensor
(rear) <4G1, 4G6-M/T>
7.Front exhaust pipe
8.Exhaust pipe gasket
9.Exhaust pipe gasket
10.Exhaust muffler hanger
EX HAUS T PIPE AND MAIN MU FFLER
INTAKE AN D EXHAU ST15-11

EXHAUST PIPE AND MAIN MUFFLER
INTAKE AND EXHAUST15-12
REMOVAL SERVICE POINT
<> ENGINE CONTROL OXYGEN SEN-
SOR (REAR) REMOVAL
AC212566AD
MD998770
Engine control
oxygen sensor
(rear)
Use spe c ia l tool oxyg en sen s or wrench (MD9987 70)
to remove t
he eng ine contro l oxygen sen s or (re ar).
INSTALLA T ION SER VICE POINT
>>A<< ENGINE CONT ROL OXYGEN SEN-
SOR (REAR) INSTALLA TION
AC212566AD
MD998770
Engine control
oxygen sensor
(rear)
Use spe c ia l tool oxyg en sen s or wrench (MD9987 70)
to inst
all the eng ine contro l oxyge n sen s or (re ar).

IGNITION SYSTEM
ENGINE ELECTRICAL16-30
IGNITION SYSTEM
GENERAL INFORMATIONM1163000100294
This system is equipped with two ignition coils (A and
B) with built-in power transistors for the No. 1 and
No. 4 cylinders and the No. 2 and No. 3 cylinders
respectively.
Interruption of the primary current flowing in the pri-
mary side of ignition coil A generates a high voltage
in the secondary side of ignition coil A. The high volt
-
age thus generated is applied to the spark plugs of
No. 1 and No. 4 cylinders to generate sparks. At the
time that the sparks are generated at both spark
plugs, if one cylinder is at the compression stroke,
the other cylinder is at the exhaust stroke, so that
ignition of the compressed air/fuel mixture occurs
only for the cylinder which is at the compression
stroke.
In the same way, when the primary current flowing in
ignition coil B is interrupted, the high voltage thus
generated is applied to the spark plugs of No. 2 and
No. 3 cylinders.
The engine-ECU or engine-A/T-ECU
turns the two power transistors inside the ignition
coils alternately on and off. This causes the primary
currents in the ignition coils to be alternately inter
-
rupted and allowed to flow to fire the cylinders in the
order 1-3-4-2.
The engine-ECU or engine-A/T-ECU
determines which ignition coil should be controlled
by means of the signals from the camshaft position
sensor which is incorporated in the camshaft and
from the crank angle sensor which is incorporated in
the crankshaft. It also detects the crankshaft position
in order to provide ignition at the most appropriate
timing in response to the engine operation condi
-
tions. It also detects the crankshaft position in order
to provide ignition at the most appropriate timing in
response to the engine operation conditions.
When the engine is cold or operated at high alti-
tudes, the ignition timing is slightly advanced to pro-
vide optimum performance.
When the automatic transmission shifts gears, the
ignition timing is also retarded in order to reduce out
-
put torque, thereby alleviating shifting shocks.
SYSTEM DIAGRAM
AK101074
Air flow sensor
<4G6> MAP sensor <4G1>
Intake air temperatur
sensor
Engine coolant
temperature sensor
Camshaft position
sensor
Crank angle sensor
Barometric pressure
sonsor <4G6>
Detonatoin sensor
Ignition switch-ST Engine-A/T-
ECU Engine-ECU

Ignition coil B
Cylinder No. 23 4
AG
1
Spark plug Ignition coil A
Ignition
switch
Battery

17-1
GROUP 17
ENGINE AND
EMISSION
CONTROL
CONTENTS
ENGINE CONTROL . . . . . . . . . .17-2
GENERAL INFORMATION . . . . . .17-2
SERVICE SPECIFICATIONS. . . . .17-2
ON-VEHICLE SERVICE. . . . . . . . .17-2
ACCEL CABLE CHECK AND
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . 17-2
ACCELERATOR CABLE AND
PEDAL . . . . . . . . . . . . . . . . . . . . . .17-3
REMOVAL AND INSTALLATION . . . . . 17-3
EMISSION CONTROL MPI . . . .17-4
GENERAL INFORMATION . . . . . .17-4
EMISSION CONTROL DEVICE
REFERENCE TABLE . . . . . . . . . .17-4
SERVICE SPECIFICATION(S) . . .17-5
VACUUM HOSE. . . . . . . . . . . . . . .17-5
VACUUM HOSE PIPING DIAGRAM . . . 17-5
VACUUM CIRCUIT DIAGRAM . . . . . . . 17-7
VACUUM HOSE CHECK. . . . . . . . . . . . 17-7
VACUUM HOSE INSTALLATION . . . . . 17-8
CRANKCASE EMISSION CONTROL
SYSTEM . . . . . . . . . . . . . . . . . . . . .17-8
GENERAL INFORMATION (CRANKCASE
EMISSION CONTROL SYSTEM) . . . . . 17-8
COMPONENT LOCATI ON (CRANKCASE
EMISSION CONTROL SYSTEM) . . . . . 17-9
POSITIVE CRANKCASE VENTILATION SYSTEM
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . 17-9
POSITIVE CRANKCASE VENTILATION (PCV)
VALVE CHECK . . . . . . . . . . . . . . . . . . . 17-9
EVAPORATIVE EMISSION CONTROL
SYSTEM . . . . . . . . . . . . . . . . . . . . .17-9
GENERAL INFORMATION (EVAPORATIVE
EMISSION CONTROL SYSTEM) . . . . . 17-9
COMPONENT LOCATION (EVAPORATIVE
EMISSION CONTROL SYSTEM) . . . . . 17-10
PURGE CONTROL SYSTEM CHECK . . 17-10
PURGE PORT VACUUM CHECK . . . . . 17-11
PURGE CONTROL SOLENOID VALVE
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . 17-11
FUEL VAPOUR CANISTER REMOVAL
AND INSTALLATION . . . . . . . . . . . . . . . 17-12
EXHAUST GAS RECIRCULATION
(EGR) SYSTEM . . . . . . . . . . . . . . .17-12
GENERAL INFORMATION
(EGR SYSTEM) . . . . . . . . . . . . . . . . . . . 17-12
COMPONENT LOCATION
(EGR SYSTEM) . . . . . . . . . . . . . . . . . . . 17-14
EGR SYSTEM CHECK . . . . . . . . . . . . . 17-15
EGR VALVE CHECK . . . . . . . . . . . . . . . 17-15
EGR PORT VACUUM CHECK <4G1>. . 17-16
EGR PORT VACUUM CHECK <4G6>. . 17-16
EGR CONTROL SOLENOID VALVE
CHECK <4G1> . . . . . . . . . . . . . . . . . . . . 17-16
EGR CONTROL SOLENOID VALVE
CHECK <4G6> . . . . . . . . . . . . . . . . . . . . 17-17
EXHAUST GAS RECIRCULATION (EGR)
VALVE REMOVAL AND I
NSTALLATION . . . . . . . . . . . . . . . . . . . . 17-18
CATALYTIC CONVERTER . . . . . .17-19
REMOVAL AND INSTALLATION
<4G1, 4G6-M/T> . . . . . . . . . . . . . . . . . . 17-19
REMOVAL AND INSTALLATION
<4G6-A/T> . . . . . . . . . . . . . . . . . . . . . . . 17-19

EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-4
INSTALLATION SERVICE POINT
>>A<< ACCEL PEDAL PAD INSTALLA-
TION
CAUTION
To prevent damages to the accelerator pedal pad,
warm the thumb area of the accelerator pedal
pad with a dryer, etc. prior to assembling it.
NOTE: If it is difficult to assemble, apply soapy water
to the thumb area to enhance the assembling proc
-
ess.
EMISSION CONTROL
GENERAL INFORMATION
M1173000100370
The emission control system consists of the following
subsystems:
•Crankcase emission control system
•Evaporative 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
Equipped
Duty cycle type solenoid valve
(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
•EGR valve
•EGR control solenoid valve
Equipped
Single type
Duty cycle type solenoid valve
(Purpose: NOx reduction)
Catalytic converterMonolith type
(Purpose: CO, HC, NOx reduction)
Exhaust emission control system
EMISSION CONTROL DEVICE
REFERENCE TABLE
M1173006600135
Related partsCrankcase
emission
control
systemEvaporative
emission
control
systemAir/fuel ratio
control
systemCatalytic
converterExhaust gas
recirculation
system
PCV valve×
Purge control solenoid valve×
MPI system component××
Catalytic converter×
EGR valve×
EGR control solenoid valve×
7.Accelerator control equip bushing
8.Accelerator pedal arm return spring
9.Accelerator pedal arm stopper
10.Accelerator pedal arm bracket
11 .Accelerator pedal arm
>>A<<12.Accelerator pedal pad
13.Accelerator pedal arm stopper
Accelerator pedal assembly
removal steps (Continued)

Battery voltageNormal condition
AppliedVacuum leaks
Not appliedVacuum maintained
EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-12
5. Measure the resistance between the terminals of the solenoid valve.
Standard value: 30 − 34 Ω (at 20°C)
FUEL VAPOUR CANISTER RE MOVAL AND INSTALLATION
M1173004200153
Pre-removal and Post-installation Operation
Air Cleaner Assembly Removal and Installation (Refer to
GROUP 15
P.15-3).
AC208253
1
2
3
4 5 6
7 8
AD
Removal steps
1.Emission vacuum hose connection
2.Fuel vapour control line hose
3.Fuel vapour control check valve
4.Fuel vapour control line hose
5.Fuel vapour control line clamp
6.Fuel vapour canister
7.Fuel high-pressure hose clamp
8.Fuel vapour canister bracket
EXHAUST GAS RECIRCULA
T ION
(EGR) SYSTEM
GENERAL INFORMAT ION (EGR SYSTEM)
M1173 0052 0032 7
The exhaust gas recircu l atio n (EGR) system lowers
the nitrogen
oxide (NOx) emission level.
When the air/fuel mixture combus tio n temp erature is
high,
a larg e qua ntity of nitrogen oxides (NOx) is
generat
ed in the comb ustion chamb e r .
Therefor e, this syst em re circulat es p a rt o f emission
gas fro
m the e x ha ust po rt of the cylinder h ead to th e
combust
i on chamber thro ugh th e int a ke ma nifold to
decre
ase the air/fuel mixture combust i on te mpera
-
ture, resulting in redu ctio n of NOx.
The EGR flow rate is cont rolle d by the EGR valve so
as no
t to de crease the driveability .
OPERAT ION
The EGR valve is being clos ed an d does not re circu-
late ex hau st ga ses unde r one o f the fo llo wing condi-
tions.
Otherwise, th e EGR va lve is opene d an d recircul ates
exha
ust g a ses.
•The engine coolan t temperature is low .
•The engine is at idle.
•The throttle va lve is widely ope ned.

EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-18
EXHAUST GAS RECIRCULATION (EGR)
VALVE REMOVAL AND INSTALLATION
M1173010500175
Pre-removal and Post-installation Operation
Air Cleaner Assembly Removal and Installation (Refer to
GROUP 15
P.15-3).
AC208130
21 ± 4 N·m
2
1
3
N
AC
<4G1>
AC301219
20 ± 2 N·m2
1
3
N
AB
Removal steps
1.Emission vacuum hose connection2.EGR valve
3.EGR valve gasket
Removal steps (Continued)