Supercharging Pressure Control System Check; Waste Gate Actuator Check - Mitsubishi Electric Lancer Evolution-VII Workshop Manual

15-4
Throttle body
Waste gate
solenoid valve
Waste gate
actuator
INTAKE AND EXHAUST -
4. When the indicated supercharging is more than standard
SUPERCHARGING PRESSURE CONTROL
SYSTEM CHECK
1. Disconnect the hose (black) from the turbocharger waste
2. Connect a hand vacuum pump to the three-way joint.
3. Disconnect the hose from the turbocharger waste gate
4. Applying a negative pressure with the hand vacuum pump,
Boost hose

WASTE GATE ACTUATOR CHECK

1. Connect a manual pump (pressure-application type) to
2. While gradually applying pressure, check the pressure that
On-vehicle Service
value, supercharging control may be faulty, therefore
check the followings.
Malfunction of the waste gate actuator
D
Malfunction of waste gate valve
D
Disconnection or cracks of the waste gate actuator
D
rubber hose
gate solenoid valve and connect a three-way joint between
the hose and the solenoid valve.
actuator control boost nipple and plug the nipple.
check tightness both when the hose end is closed and
when it is open.
Engine state Hose end
Stop (Ignition p ( g Opened
switch: "ON" it h "ON"
Closed
position)
Idling (after
warm-up)
NOTE
If this check indicates an abnormal condition, the
turbocharger waste gate actuator, turbocharger waste
gate solenoid or hose is broken.
nipple.
begins to activate (approximately 1 mm stroke) the waste
gate actuator rod.
Standard value: Approximately 100 kPa
Caution
In order to avoid damage to the diaphragm, do not
apply a pressure of 117 kPa or higher.
Normal state
Negative pressure leaks.
Negative pressure is
maintained.
Negative pressure leaks.