Mitsubishi Lancer Evolution IX. Manual - part 359
EMISSION CONTROL <MPI>
ENGINE AND EMISSION CONTROL
17-15
EGR VALVE CHECK
M1173002800308
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 negative pressure of 67 kPa, and check
that the negative pressure is maintained.
AKX00348
4. Apply negative pressure and check the passage
of air by blowing through one side of the EGR
passage.
Vacuum
Passage of air
5.3 kPa or less
Air is not blown out
27 kPa or more
Air is blown out
5. Replace the gasket, and tighten to the specified
torque.
Tightening torque: 20
± 2 N⋅m
EGR PORT VACUUM CHECK
M1173002900242
AK304238 AB
White stripe
Throttle body
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 vacuum is generated
regardless of the engine speed.
5. If no vacuum is generated, the port is probably
blocked and should be cleaned.
EGR CONTROL SOLENOID VALVE
CHECK
M1173003100368
NOTE: When disconnecting the vacuum hose,
always make a mark so that it can be reconnected at
original position.
AK100015
B
A
C
AF
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 negative pressure
with voltage applied directly from the battery to the
EGR control solenoid valve and without applying
voltage.