Mitsubishi Lancer. Manual — part 217

EMISSION CONTROL <MPI>

ENGINE AND EMISSION CONTROL

17-16

5. Replace the gasket, and tighten to the specified

torque.

Tightening torque:

<4G1> 21

± 4 N⋅ m

<4G6> 20

± 2 N⋅ m

EGR PORT VACUUM CHECK <4G1>

M1173002900167

AK300784AB

Green strip

1. Disconnect the vacuum hose (Green stripe) from

the throttle body EGR vacuum nipple and connect
a hand vacuum pump to the nipple.

2. Plug the vacuum hose (Green stripe).

AK201224AB

Vac-
uum

Engine speed (r/min)

3. Start the engine and check that, after raising the

engine speed by racing the engine, purge vacuum
raises according to engine speed.
NOTE: If there is a problem with change in vac-
uum, the throttle body purge port may be clogged
and require cleaning.

EGR PORT VACUUM CHECK <4G6>

M1173002900156

AK300786AB

White stripe

1. Disconnect the vacuum hose (White stripe) from

the throttle body EGR vacuum nipple and connect
a hand vacuum pump to the nipple.

2. Plug the vacuum hose (White stripe).

AK100011

AC

Vac-
uum

Engine speed (r/min)

3. Start the engine.
4. Check that a fairly constant negative is generated

regardless of the engine speed.

5. If no negative pressure is generated, the port is

probably blocked and should be cleaned.

EGR CONTROL SOLENOID VALVE
CHECK <4G1>

M1173003100238

NOTE: When disconnecting the vacuum hose,
always make a mark so that it can be reconnected at
original position.

AKX00351

A

B

AE

Battery

1. Disconnect the vacuum hose from the solenoid

valve.

2. Disconnect the harness connector.
3. Connect a hand vacuum pump to nipple (A) of the

solenoid valve (refer to the illustration at left).

4. Check air tightness by applying a vacuum with

voltage applied directly from the battery to the
EGR control solenoid valve and without applying
voltage.

Battery voltage

Normal condition

Applied

Vacuum leaks

Not applied

Vacuum maintained

AKX00352

EMISSION CONTROL <MPI>

ENGINE AND EMISSION CONTROL

17-17

5. Measure the resistance between the terminals of

the solenoid valve.

Standard value: 29

− 35 Ω (at 20° C)

EGR CONTROL SOLENOID VALVE
CHECK <4G6>

M1173003100249

NOTE: When disconnecting the vacuum hose,
always make a mark so that it can be reconnected at
original position.

AK201251AB

A

B

C

Battery

1. Disconnect the vacuum hose from the solenoid

valve.

2. Disconnect the harness connector.
3. Connect a hand vacuum pump to nipple (A) of the

solenoid valve (refer to the illustration at left).

4. Check air tightness by applying a vacuum with

voltage applied directly from the battery to the
EGR control solenoid valve and without applying
voltage.

Battery
voltage

B nipple
condition

Normal condition

Not applied

Open

Vacuum
maintained

Applied

Open

Vacuum leaks

Closed

Vacuum
maintained

AK100016

5. Measure the resistance between the terminals of

the solenoid valve.

Standard value: 29

− 35 Ω (at 20° C)

EMISSION CONTROL <MPI>

ENGINE AND EMISSION CONTROL

17-18

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·m

2

1

3

N

AB

Removal steps

1.

Emission vacuum hose connection

2.

EGR valve

3.

EGR valve gasket

Removal steps (Continued)

EMISSION CONTROL <MPI>

ENGINE AND EMISSION CONTROL

17-19

CATALYTIC CONVERTER

REMOVAL AND INSTALLATION <4G1,
4G6-M/T>

M1173003900773

Refer to GROUP 15 - Exhaust Pipe and Main Muffler

P.15-10

.

REMOVAL AND INSTALLATION
<4G6-A/T>

M1173003900784

AC504823

2

3

N

N

4

59 ± 10 N·m

50 ± 10 N·m

1

45 ± 5 N·m

AB

Removal steps

<<

A

>>

>>

A

<<

1.

Oxygen sensor

2.

Catalytic converter

3.

Gasket

4.

Gasket

REMOVAL SERVICE POINT
<<A>> OXYGEN SENSOR REMOVAL

AC212566AB

MD998770

Oxygen sensor

Use special tool oxygen sensor wrench (MD998770)
to remove the oxygen sensor.

INSTALLATION SERVICE POINT
>>A<< OXYGEN SENSOR INSTALLATION

AC212566AB

MD998770

Oxygen sensor

Use special tool oxygen sensor wrench (MD998770)
to install the oxygen sensor.