Mitsubishi Eclipse. Manual — part 708

EMISSION CONTROL

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ENGINE AND EMISSION CONTROL

17-113

3. Stop the engine. Remove the Tee-fitting and the hand

vacuum pump.

4. Connect the hand vacuum pump directly to the EGR valve.
5. Start the engine and run at idle until warm.
6. The engine idling speed should be rough when a vacuum of

29 kPa (8.7 in Hg) or more is applied to the EGR valve.

7. If engine idles rough, EGR passage is open and the system

is OK. If engine idle is not rough, the EGR passage and the
valve must be checked for restrictions. Perform the EGR
valve check. Then repeat the exhaust gas recirculation
system check.

VACUUM CONTROL VALVE CHECK

M1173002700129

1. Disconnect the vacuum hose (white stripe) from the vacuum

control valve and connect the hand vacuum pump to the
vacuum control valve.

2. Plug the end of the removed vacuum hose.
3. Start the engine and run at idle.
4. As described in the chart below, check the vacuum

condition.

EGR VALVE CHECK

M1173002800137

1. Remove the EGR valve and inspect for sticking, carbon

deposits, etc. If found, clean with a suitable solvent so that
the valve seats correctly.

2. Connect a hand vacuum pump to the EGR valve.
3. Apply 67 kPa (20 in Hg) of vacuum, and check to be sure

that the vacuum is maintained.

4. As described in the chart below, apply a vacuum and check

the passage of air by blowing through one side of the EGR
passage.

AKX01318

PLUG

EGR VALVE

BLACK

AB

<2.4L ENGINE>

AKX01319 AB

EGR VALVE

BLACK

PLUG

<3.0L ENGINE>

ENGINE CONDITION

NORMAL VACUUM
CONDITION

Idling

Approximately 21.3

− 24.0 kPa

(6.3

− 7.1 in Hg)

AKX01320

WHITE STRIPE

PLUG

AB

AKX00348

EMISSION CONTROL

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ENGINE AND EMISSION CONTROL

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NOTE: Passage of air should be checked by blowing the
valve port.

5. Reinstall the EGR valve, using a new gasket, and tighten to

the specified torque.

Tightening torque:

<2.4L ENGINE> 19

± 3 N⋅m (14 ± 2 ft-lb)

<3.0L ENGINE> 22

± 4 N⋅m (16 ± 3 ft-lb)

EGR PORT VACUUM CHECK

M1173002900048

1. Disconnect the vacuum hose (green stripe) from the throttle

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

2. Start the engine.
3. Measure engine vacuum at idle.

Standard value: 51 kPa (15 in Hg) or more

4. Reset the vacuum pump to "0" (Release vacuum).
5. Using a stop watch, measure how long it takes for the

vacuum gauge to reach 51 kPa (15 in Hg).

Standard value: 1.0 second or less

6. If it takes more than 1.0 second for the gauge to reach 51

kPa (15 in Hg), the EGR may be restricted and should be
cleaned.

VACUUM

PASSAGE OF AIR

5.3 kPa (1.6 in Hg) or less

Air is not blown out

29 kPa (8.7 in Hg) or more

Air is blown out

AKX01322

EGR PORT
VACUUM NIPPLE

<2.4L ENGINE>

AB

AKX01323

EGR PORT
VACUUM NIPPLE

<3.0L ENGINE>

AB

AKX00350

1.0 SECOND

VACUUM

RESET

TIME

AB

EMISSION CONTROL

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ENGINE AND EMISSION CONTROL

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EGR VACUUM REGULATOR SOLENOID VALVE
CHECK

M1173003100227

1. Disconnect the vacuum hose from the EGR vacuum

regulator solenoid valve.
NOTE: When disconnecting the vacuum hose, always make
sure 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 EGR

vacuum regulator solenoid valve. (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 EGR vacuum regulator solenoid valve and
without applying voltage.

5. Measure the resistance between the terminals of the EGR

vacuum regulator solenoid valve.

Standard value: 29

− 35 Ω [at 20°C (68°F)]

6. Replace the EGR vacuum regulator solenoid valve if

resistance is out of specification.

VOLUME AIRFLOW SENSOR CHECK

M1173007900504

<2.4L ENGINE>

To inspect the sensor, refer to GROUP 13A, Multiport Fuel
Injection (MFI) <2.4L>

− Multiport Fuel Injection (MFI) Diagno-

sis

− Diagnostic Trouble Code Chart

P.13A-24

.

<3.0L ENGINE>

To inspect the sensor, refer to GROUP 13B, Multiport Fuel
Injection (MFI) <3.0L>

− Multiport Fuel Injection (MFI) Diagno-

sis

− Diagnostic Trouble Code Chart

P.13B-23

.

ENGINE COOLANT TEMPERATURE SENSOR
CHECK

M1173008100501

<2.4L ENGINE>

To inspect the sensor, refer to GROUP 13A, Multiport Fuel
Injection (MFI) <2.4L>

− Multiport Fuel Injection (MFI) Diagno-

sis

− Diagnostic Trouble Code Chart

P.13A-24

.

BATTERY POSITIVE
VOLTAGE

NORMAL CONDITION

Not applied

Vacuum leaks

Applied

Vacuum maintained

AKX00351

A

B

AB

AKX00352

EMISSION CONTROL

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ENGINE AND EMISSION CONTROL

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<3.0L ENGINE>

To inspect the sensor, refer to GROUP 13B, Multiport Fuel
Injection (MFI) <3.0L>

− Multiport Fuel Injection (MFI) Diagno-

sis

− Diagnostic Trouble Code Chart

P.13B-23

.

CRANKSHAFT POSITION SENSOR CHECK

M1173008300259

<2.4L ENGINE>

To inspect the sensor, refer to GROUP 13A, Multiport Fuel
Injection (MFI) <2.4L>

− Multiport Fuel Injection (MFI) Diagno-

sis

− Diagnostic Trouble Code Chart

P.13A-24

.

<3.0L ENGINE>

To inspect the sensor, refer to GROUP 13B, Multiport Fuel
Injection (MFI) <3.0L>

− Multiport Fuel Injection (MFI) Diagno-

sis

− Diagnostic Trouble Code Chart

P.13B-23

.