Mitsubishi Lancer Evolution 8 MR. Manual - part 15
INTAKE – EXHAUST – VEHICLE SERVICING
15-2
1) Wastegate actuator misoperation
2) Wastegate valve misoperation
3) Wastegate actuator rubber hose detachment, cracking.
2. Boost pressure control system inspection <6M/T>
Note
The driving test, which is done with the throttle fully open,
must be done in a safe place with two people in the vehicle.
The person sitting in the passenger seat should take the
reading of the values on the pressure gauge.
(1) Remove hose (black) from No.1 wastegate solenoid valve, then
connect a three-way coupling between the hose and the
solenoid valve.
(2) Connect a hand vacuum pump to the three-way coupling.
(3) Remove boost hose from the wastegate actuator control boost
nipple on the air outlet fitting, and fit a plug over the nipple.
(4) Apply a vacuum whilst covering and releasing the tip of the
hose to check the vacuum condition.
(5) Ignition switch to “LOCK” (OFF) position.
(6) Remove wastegate solenoid valve connector.
(7) Apply a vacuum whilst covering and releasing the tip of the
hose, to check the vacuum condition (stop the hose tip with a
plug when driving).
Note
When vacuum condition is not normal, it may be assumed that
there is a problem with the wastegate actuator, wastegate solenoid
valve, or hose.
Engine condition
Boost hose tip
Normal condition
Stop (ignition
switch: “ON”
position)
Released
Vacuum leaks
Covered
Vacuum is maintained
Idle running after
warming up.
Vacuum leaks
Engine condition
Boost hose tip
Normal condition
Stop (ignition switch:
“ON” position)
Released
Vacuum leaks
Covered
Vacuum is maintained
Accelerating with
throttle full open in
2nd gear (at least
3500rpm)
Vacuum leaks
Air cleaner
No.1 Wastegate
solenoid valve
No.2 Wastegate
solenoid valve
Wastegate
actuator
Boost hose