Question about 2005 Mitsubishi Lancer

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2002 Mitsubishi Lancer

Changed oil, filter and replaced valve cover gasket...simple!
Upon starting noticed an engine miss, read DTC of P0303, which is #3 cylinder misfire. Ended up checking timing, replacing spark plugs and wires, coils checked out fine, codes got worse (from 2 to 5 codes, cleared and then ended up with original 2 codes.) Replaced O2 sensor which was one of the known bad ones. Original misfire led to engine not wanting to start at all....replaced cam position sensor as it was one code that showed up early on. Finally towed the car to a mechanic-owner of Japanese car repair shop (well known to me and other vehicles of mine) where he and a co-mechanic worked on the Lancer for about 12 hours of labor, replacing crankshaft position sensor and for the first time in his 20+ years in the business, had to have me tow the car away from the shop as the car would not respond! (Charged just an hour labor which is unheard of in this area after expending so much effort.) Engine seems to get fuel, spark, timing right on as far as cam/crankshaft and timing belt, may fire and attempt to chug along for 3-5 seconds at best. Help!

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  • Katie May 11, 2010

    I have a possible solution, but may not apply to you, but did they check the valves? All mine were bent and I got the same code as you did for #3 cylinder misfire.



    After I replaced the valves, car works perfect with the exception of little things here and there, like my oil pressure switch and oil seal.



    Let me know if this helps a little bit.

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Have you tried swapping out the front engine ecu?

Posted on Jan 04, 2010

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