Mitsubishi Lancer Evolution 7. Manual — part 236
ENGINE AND EMISSION CONTROL -
Emission Control System
17-5
SERVICE SPECIFICATIONS
Items
Standard value
Purge control solenoid valve coil resistance (at 20_C) Ω
30 - 34
EGR control solenoid valve coil resistance (at 20_C) Ω
29 - 35
VACUUM HOSE
VACUUM HOSE PIPING DIAGRAM
Fuel
pressure
control
solenoid
valve
Oxygen
sensor
(front)
Check
valve
Fuel
pressure
regulator
PCV valve
To
fuel tank
Oxygen sensor (rear)
From
fuel pump
Air
inlet
EGR control
solenoid valve
Purge
control
solenoid
valve
Canister
From
fuel tank
EGR
valve
Injector
Three-way
catalytic converter
A
P
E
ENGINE AND EMISSION CONTROL -
Emission Control System
17-6
VACUUM CIRCUIT DIAGRAM
Vacuum hose colour
B: Black
G: Green
L: Light blue
R: Red
W: White
Y: Yellow
From air
cleaner
Intake manifold
Throttle body
To
combustion
chamber
Fuel pressure
regulator
EGR control
solenoid valve
Canister
EGR valve
Brown
Check valve
Vacuum
tank
Fuel pressure
solenoid valve
Air by-pass valve
Secondary air control
solenoid valve
Secondary air
control valve
Purge control
solenoid valve
Air cleaner
Waste gate
solenoid valve
Waste gate
actuator
ENGINE AND EMISSION CONTROL -
Emission Control System
17-7
VACUUM HOSE CHECK
1. Using the piping diagram as a guide, check to be sure
that the vacuum hoses are correctly connected.
2. Check the connection condition of the vacuum hoses,
(removed, loose, etc.) and check to be sure that there
are no bends or damage.
VACUUM HOSE INSTALLATION
1. When connecting the vacuum hoses, they should be
securely inserted onto the nipples.
2. Connect the hoses correctly, using the vacuum hose piping
diagram as a guide.
ENGINE AND EMISSION CONTROL -
Emission Control System
17-8
CRANKCASE EMISSION CONTROL SYSTEM
GENERAL INFORMATION
The crankcase emission control system prevents
blow-by gases from escaping inside the crankcase
into the atmosphere.
Fresh air is sent from the air cleaner into the
crankcase through the breather hose. The air
becomes mixed with the blow-by gases inside the
crankcase.
The blow-by gas inside the crankcase is drawn
into the intake manifold through the positive
crankcase ventilation (PCV) valve.
The PCV valve lifts the plunger according to the
intake manifold vacuum so as to regulate the flow
of blow-by gas properly. In other words, the blow-by
gas flow is regulated during low load engine
operation to maintain engine stability, while the flow
is increased during high load operation to improve
the ventilation performance.
SYSTEM DIAGRAM
Ventilation hose
PCV valve
Breather hose
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