OBD 2 code P0301 cylinder 1 misfire detected on 2001 Mitsubishi Mirage

what should i start to check or replace first

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2 answers
check for compression first. then the plug, wire and the injector.

Roy
You need compression, fuel and spark to fire. Check the plugs first, may just be a minor tuneup. Get back to me with an answer and we can go from there. Good luck.