Mitsubishi Space Star. Manual - part 103

ENGINE AND EMISSION CONTROL  – 

Emission Control System <4G93-GDI, 4G13-MPI>

17-7

PURGE CONTROL SYSTEM CHECK <GDI>

1.

Disconnect the vacuum hose (black) from the intake
manifold and connect it to a hand vacuum pump.

2.

Plug the nipple from which the vacuum hose was removed.

3.

When the engine is cold or hot, apply a vacuum of 53
kPa, and check the condition of the vacuum.

When engine is cold
(Engine coolant temperature: 40



C or less)

Engine condition

Normal condition

At idle

Vacuum is maintained

3,000 r/min

When engine is hot
(Engine coolant temperature: 80



C or higher)

Engine condition

Normal condition



At idle



For 4 minutes after the
engine is started

Vacuum is maintained



3,000 r/min



For 3 minutes after the
engine is started

Vacuum will leak.

PURGE CONTROL SYSTEM CHECK <MPI>

1.

Disconnect the vacuum hose (red stripe) from the throttle
body and connect it to a hand vacuum pump.

2.

Plug the nipple from which the vacuum hose was removed.

3.

When the engine is cold or hot, apply a vacuum of 53
kPa, and check the condition of the engine and the vacuum.
When engine is cold
(Engine coolant temperature: 40



C or less)

Engine condition

Normal condition

At idle

Vacuum is maintained.

3,000 r/min

When engine is hot
(Engine coolant temperature: 80



C or higher)

Engine condition

Normal condition

At idle

Vacuum is maintained.

3,000 r/min 
(for approximately 3 minutes
after the engine is started.)

Vacuum will leak.

Vacuum hose
(black)

Plug

Plug

Red stripe

ENGINE AND EMISSION CONTROL  – 

Emission Control System <4G93-GDI, 4G13-MPI>

17-8

PURGE PORT VACUUM CHECK <GDI>

1.

Disconnect the vacuum hose (black) from the intake
manifold purge vacuum nipple and connect a hand vacuum
pump to the nipple.

2.

Start the engine and check that the vacuum remains fairly
constant after racing the engine.

NOTE
If vacuum changes, it is possible that the intake manifold
purge port may be clogged and require cleaning.

PURGE PORT VACUUM CHECK <MPI>

1.

Disconnect the vacuum hose (red stripe) from the throttle
body purge vacuum nipple and connect a hand vacuum
pump to the nipple.

2.

Start the engine and check that the vacuum remains fairly
constant after racing the engine.

NOTE
If vacuum changes, it is possible that the intake manifold
purge port may be clogged and require cleaning.

Purge port 
vacuum nipple

Vacuum

Engine speed (r/min)

Purge port 
vacuum nipple

Vacuum

Engine speed (r/min)

ENGINE AND EMISSION CONTROL  – 

Emission Control System <4G93-GDI, 4G13-MPI>

EGR valve

17-9

PURGE CONTROL SOLENOID VALVE CHECK

NOTE
When disconnecting the vacuum hose, always make a mark
so that it can be reconnected at original position.
1.

Disconnect the vacuum hose (black stripe, red stripe) 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 airtightness by applying a vacuum with voltage
applied directly from the battery to the purge control
solenoid valve and without applying voltage.

Battery voltage

Normal condition

Applied

Vacuum leaks

Not applied

Vacuum maintained

5.

Measure the resistance between the terminals of the
solenoid valve.

Standard value: 30 – 34 

Ω

 (at 20



C)

EXHAUST GAS RECIRCULATION (EGR) SYSTEM <MPI>

COMPONENT LOCATION

EGR VALVE

REMOVAL AND INSTALLATION

Refer to GROUP 15 – Intake Manifold.

Battery

B

A

ENGINE AND EMISSION CONTROL – 

Emission Control System <F9Q1>

17-10

EMISSION CONTROL SYSTEM <F9Q1>

GENERAL

OUTLINE OF CHANGE

The following maintenance service points have been established to correspond to the adoption of the
F9Q1 engine.

GENERAL INFORMATION

The electronically-controlled EGR system consists of an EGR valve, engine-ECU and various sensors.
The EGR valve is optimally controlled by the engine-ECU in response to the engine operation conditions,
based on data input from each of the sensors. In this way, the EGR valve is controlled to reduce NOx
emissions while maintaining good engine performance.

Items

Name

Specification

Exhaust emission control system

Exhaust gas recirculation system



EGR valve



EGR valve position sensor

Electronically-controlled EGR system
Electric motor type
Potentiometer type

SERVICE SPECIFICATIONS

Items

Standard value

EGR valve resistance   

Ω

 (at 20



C)

7.5 – 8.5

EGR valve position sensor resistance   k

Ω

 (at 20



C)

2.4 – 5.6