Mitsubishi Montero (2004+). Manual - part 413
EMISSION CONTROL
TSB Revision
ENGINE AND EMISSION CONTROL
17-59
EMISSION CONTROL
GENERAL DESCRIPTION
M1173000100228
The emission control system consists of the fol-
lowing subsystems:
• Positive crankcase ventilation system
• Evaporative emission system
• Exhaust emission control system
DIAGNOSIS
M1173000700112
SYMPTOM
PROBABLE CAUSE
REMEDY
Engine will not start or hard
to start
Vacuum hose disconnected or damaged Repair or replace
The EGR valve (Stepper Motor) is not
closed.
Repair or replace
Malfunction of the evaporative emission
purge solenoid
Repair or replace
Rough idle or engine stalls
The EGR valve (Stepper Motor) is not
closed.
Repair or replace
Vacuum hose disconnected or damaged. Repair or replace
Malfunction of the positive crankcase
ventilation valve
Replace
Malfunction of the purge control system
Check the system; If there is a
problem, check its component
parts.
Engine hesitates or poor
acceleration
Malfunction of the exhaust gas
recirculation system
Check the system; If there is a
problem, check its component
parts.
Excessive oil consumption
Positive crankcase ventilation line
clogged
Check positive crankcase
ventilation system
Poor fuel mileage
Malfunction of the exhaust gas
recirculation system
Check the system; If there is a
problem, check its component
parts.