2012 Mitsubishi Eclipse SEFACTORY OEM SERVICE PROCEDURE

Emission Control System: Diagnosis

DIAGNOSIS CHART

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.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.