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Emission Control - Lancer: Diagnosis

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. < NON-TURBO > 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. < NON-TURBO > Repair or replace
Vacuum hose disconnected or damaged. Repair or replace
Malfunction of the PCV 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 EGR system Check the system; If there is a problem, check its component parts.
Excessive oil consumption PCV line clogged Check PCV system
Poor fuel mileage Malfunction of the EGR system Check the system; If there is a problem, check its component parts.