Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMITSUBISHI2005LANCER EVOLUTION L4-2.0L DOHC TURBOREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONSYMPTOM RELATED DIAGNOSTIC PROCEDURESINSPECTION PROCEDURE 25
2005 Mitsubishi Lancer Evolution L4-2.0L DOHC Turbo
Inspection Procedure 25
2005 Mitsubishi Lancer Evolution L4-2.0L DOHC TurboSECTION Inspection Procedure 25
Pressure Test of the Evaporative System Failure
COMMENT
- The test fails if there is a leak from the fuel tank or vapor line.
TROUBLESHOOTING HINTS (The most likely causes for this case:)
- Loose fuel tank filler tube cap.
- Broken seal in fuel tank vapor line evaporative emission canister.
DIAGNOSIS
STEP 1. Check the evaporative emission purge solenoid
Refer to Emission Control System - Evaporative Emission Purge Solenoid Check.
Q: Is the evaporative emission purge solenoid normal?
YES: Go to Step 2.
NO: Repair or replace. Then confirm that the malfunction symptom is eliminated.
STEP 2. Check the evaporative emission ventilation solenoid.
Refer to Emission Control System - Evaporative Emission Ventilation Solenoid Check.
Q: Is the evaporative emission ventilation solenoid normal?
YES: Check the following items and repair or replace the defective items.
a. Check for leaks from the vapor line or evaporative emission canister.
b. Check for leaks from the fuel tank.
Then confirm that the malfunction symptom is eliminated.
NO: Repair or replace. Then confirm that the malfunction symptom is eliminated.
COMMENT
- The test fails if there is a leak from the fuel tank or vapor line.
TROUBLESHOOTING HINTS (The most likely causes for this case:)
- Loose fuel tank filler tube cap.
- Broken seal in fuel tank vapor line evaporative emission canister.
DIAGNOSIS
STEP 1. Check the evaporative emission purge solenoid
Refer to Emission Control System - Evaporative Emission Purge Solenoid Check.
Q: Is the evaporative emission purge solenoid normal?
YES: Go to Step 2.
NO: Repair or replace. Then confirm that the malfunction symptom is eliminated.
STEP 2. Check the evaporative emission ventilation solenoid.
Refer to Emission Control System - Evaporative Emission Ventilation Solenoid Check.
Q: Is the evaporative emission ventilation solenoid normal?
YES: Check the following items and repair or replace the defective items.
a. Check for leaks from the vapor line or evaporative emission canister.
b. Check for leaks from the fuel tank.
Then confirm that the malfunction symptom is eliminated.
NO: Repair or replace. Then confirm that the malfunction symptom is eliminated.
RENDER: 1.0x
NO RELATED
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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.