Mitsubishi Lancer Evolution X. Manual - part 122

EMISSION CONTROL <MFI - T/C>

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ENGINE AND EMISSION CONTROL

17-75

COMPONENT LOCATION

M1173007500788

PURGE CONTROL SYSTEM CHECK (PURGE FLOW CHECK)

M1173001401430

Required Special Tool:

• MB995061: Purge Flow Indicator

1. Disconnect the purge hose from the evaporative emission 

(EVAP) purge solenoid, and connect special tool MB995061 
between the EVAP purge solenoid and the purge hose.

AK704216

AB

Evaporative emission
purge solenoid

AK704641

AB

Evaporative emission 
ventilation solenoid

Fuel vapor
canister
assembly

AK704217AD

Intake manifold

Throttle body

To combustion
chamber

Check valve

From
air
cleaner

OFF

ON

Purge
flow
indicator
(MB995061)

Purge hose

Evaporative 
emission 
purge 
solenoid
(ON: open)

Evaporative
emission
canister

EMISSION CONTROL <MFI - T/C>

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ENGINE AND EMISSION CONTROL

17-76

2. Before inspection and adjustment, set the vehicle in the 

following conditions:

• Engine coolant temperature: 80 − 95° C (176 − 203° F)
• Lights, electric cooling fan and accessories: OFF
• Transaxle: Neutral (P range on vehicles with TC-SST)

3. Run the engine at idle for more than four minutes.
4. Check the purge flow volume when engine is revved 

suddenly several times.

Standard value: Momentarily 20 cm

3

/s (2.5 SCFH) or 

more.

5. If the purge flow volume is less than the standard value, 

check it again with the vacuum hose disconnected from the 
EVAP canister. If the purge flow volume is less than the 
standard value, check the vacuum port and the vacuum 
hose for clogging. Also check the EVAP purge solenoid. If 
the purge flow volume is at the standard value, with the 
EVAP canister disconnected, replace the EVAP canister.

EVAPORATIVE EMISSION PURGE SOLENOID 
CHECK

M1173001700773

1. Disconnect the vacuum hose (black, black with red paint 

mark) from the evaporative emission (EVAP) purge 
solenoid.
NOTE: When disconnecting the vacuum hose, always place 
an identification mark so that it can be reconnected at its 
original position.

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

purge solenoid (refer to the illustration at left).

4. As described in the chart below, check airtightness by 

applying a vacuum with voltage applied directly from the 
battery to the EVAP purge solenoid valve and without 
applying voltage.

Jumper wire

Nipple "B" state Normal state

Connected

Opened

Negative 
pressure leaks

Closed

Negative 
pressure 
maintained

Disconnected

Opened

Negative 
pressure 
maintained

AK200339AB

A

B

EMISSION CONTROL <MFI - T/C>

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ENGINE AND EMISSION CONTROL

17-77

5. Measure the resistance between the terminals of the EVAP 

purge solenoid.

Standard value: 22 − 26 Ω [at 20° C (68° F)]

6. Replace the solenoid if resistance is out of specification.

MASS AIRFLOW SENSOR CHECK

M1173050400213

To inspect the sensor, refer to GROUP 13A, Multiport Fuel 
Injection (MFI) − Multiport Fuel Injection (MFI) Diagnosis − Diag-

nostic Trouble Code Chart 

P.13A-48

.

INTAKE AIR TEMPERATURE SENSOR 1 CHECK

M1173008200489

To inspect the sensor, refer to GROUP 13A, Multiport Fuel 
Injection (MFI) − Multiport Fuel Injection (MFI) Diagnosis − Diag-

nostic Trouble Code Chart 

P.13A-48

.

BAROMETRIC PRESSURE SENSOR CHECK

M1173008000388

To inspect the sensor, refer to GROUP 13A, Multiport Fuel 
Injection (MFI) − Multiport Fuel Injection (MFI) Diagnosis − Diag-

nostic Trouble Code Chart 

P.13A-48

.

ENGINE COOLANT TEMPERATURE SENSOR 
CHECK

M1173008100772

To inspect the sensor, refer to GROUP 13A, Multiport Fuel 
Injection (MFI) − Multiport Fuel Injection (MFI) Diagnosis − Diag-

nostic Trouble Code Chart 

P.13A-48

.

THROTTLE POSITION SENSOR CHECK

M1173050500038

To inspect the sensor, refer to GROUP 13A, Multiport Fuel 
Injection (MFI) − Multiport Fuel Injection (MFI) Diagnosis − Diag-

nostic Trouble Code Chart 

P.13A-48

.

CRANKSHAFT POSITION SENSOR CHECK

M1173008300419

To inspect the sensor, refer to GROUP 13A, Multiport Fuel 
Injection (MFI) − Multiport Fuel Injection (MFI) Diagnosis − Diag-

nostic Trouble Code Chart 

P.13A-48

.

AK103872

EMISSION CONTROL <MFI - T/C>

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ENGINE AND EMISSION CONTROL

17-78

EVAPORATIVE EMISSION CANISTER AND FUEL TANK PRESSURE RELIEF 
VALVE

REMOVAL AND INSTALLATION

M1173004800520

Pre-removal and post-installation operation
• Rear Wheel Splash Shield Rear Removal and Installation 

(Refer to GROUP 42A, Splash Shield 

P.42A-12

).

AC709346

4.5 ± 1.5 N·m
40 ± 13 in-lb

4.5 ± 1.5 N·m
40 ± 13 in-lb

5.5 ± 1.5 N·m
49 ± 13 in-lb

11 ± 2 N·m
93 ± 22 in-lb

11 ± 2 N·m
93 ± 22 in-lb

1

2

3

4

5

6

7

8

9

10

AB

Removal steps 

1.

Evaporative emission ventilation 
solenoid valve connector 
connection

2.

Fuel vapor tube assembly

3.

Fuel purge pipe assembly 
connection

4.

Vent hose A

5.

Air filter

6.

Vent hose B

7.

Fuel vapor canister and bracket 
assembly

8.

Fuel vapor canister bracket

9.

Fuel vapor canister assembly

10. Vent pipe

Removal steps (Continued)