P0300 Mitsubishi -

Question

the answer to possible causes fit good on my problem,the engine can be hard to start and get running smoothly without missing. also misfires at high and low speeds with a sometime loss of power feeling hard to start after sitting overnight 50% of the time,and yet this morning it started normal and ran without a noticeable misfire....have replaced the spark plugs, ignition coils, fuel filter and looking at replacing the misfire sensor,kinda feel that may be doing just what its supposed to do though.and now thinking of checking out the fuel pump and or injectors.

Answer 1

have you check compression? I would also remove the egr and clean it

see compression check and fuel pressure specs below

if problem is still there maybe check the timing