Component Location; Exhaust Gas Recirculation (Egr) Control System Check - Mitsubishi Electric Lancer Evolution-VII Workshop Manual

17-14
ENGINE AND EMISSION CONTROL -

COMPONENT LOCATION

EGR control solenoid valve
Vacuum tank
Three-way
terminal
Vacuum
EGR control
tank
solenoid valve
Green stripe
Vacuum
EGR control
tank solenoid valve
Alternator
EXHAUST GAS RECIRCULATION (EGR)
CONTROL SYSTEM CHECK
1. Disconnect the vacuum hose (green stripe) from the EGR
control solenoid valve, and then connect a hand vacuum
pump via the three-way terminal.
2. When the engine is hot or cold, check the condition of
vacuum by racing the engine.
When engine is cold
Alternator
(Engine coolant temperature: 20_C or less)
When engine is hot
(Engine coolant temperature: 80_C or higher)
3. Disconnect the three-way terminal.
4. Connect the hand vacuum pump to the vacuum hose
(green stripe).
5. Check whether the engine stalls or the idling is unstable
when a vacuum of 27 kPa or higher is applied during
idling.
Alternator
Emission Control System
EGR valve
Throttle valve Normal vacuum condition
Open quickly No vacuum will generate
(the same as barometric pressure.)
Throttle valve Normal vacuum condition
Open quickly It will momentarily rise over 13 kPa
Throttle body