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.
2003 Mitsubishi Lancer EvolutionFACTORY OEM SERVICE PROCEDURE
Compression Pressure Check
WARNING: This page is about a different variant/trim than selected.
- Before inspection, check that the engine oil, starter and battery are normal. Also, set the vehicle to the following conditions:
- Engine coolant temperature: 80 - 95°C (176 - 203°F)
- Lights, and all accessories: OFF
- Transaxle: Neutral (P range on vehicles with A/T)
- Disconnect the spark plug cables.
- Remove all of the spark plugs.
- Disconnect the crankshaft position sensor connector.NOTE: Doing this will prevent the engine control module from carrying out ignition and fuel injection.
Factory Service Tools
Use the Manual With the Right Hardware
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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.