does marinating pork in apple cider vinegar kill all potential bacteria? If so would it be good after 2 weeks in a fridge?

I would not cook any raw meat that was marinating for 2 weeks in the refrigerator. I can't imagine it would be safe and the meat would be so permeated with the marinade that it wouldn't taste like pork anymore.

I can't imagine that it does / that the pork should be used. I'm no expert but I would definitely toss it. I suspect that if you let the pork come to room temperature, your nose would confirm that, without any doubt. ;o)