Installed ZZP stage 3 kit...injectors, pulley, plugs, pcm ect ect, last year before i put it away for winter. Had an issue with an at idle misfire. Turned out to be a bad injector they sent me with the kit. Got it warrentied no prob. Well i get it out this year and i get a check eng light...P0302 miss on #2 cyl AT IDLE ONLY. I cannot get it to go away and its really irritating because i've run out of options. This is what ive done...ohmed out injectors...good, swaped injectors...no difference, swaped plugs....no difference, swaped and ohmed out coils...no difference, psi tested the cyls....all within 2 lbs of each other, leak tested cyls...no leakage. It does not knock or ping at idle. There is one thing i haven't done yet which is getting done next week....i have not had the car tuned. I know the pcm they give you with the kit is a complete bare bones tune in order for the thing to just run because no 2 cars are alike. So like i said, im getting it professionaly tuned next week.....can or will that help me out here? Will the tune fix my problem? Any ideas?

 

id say tune it and itll go away most parts with throw codes unless taking away with a tune