Hi, this is the first mustang I’ve ever owned!

Anyways I keep getting a cylinder 2 misfire, the misfire seems to be intermittent, plugs, alternator and wires have been changed and the misfire is usually at idle. When I take it for a drive I don’t feel a misfire at all but eventually the check engine comes on for a cylinder two misfire. My next idea was replacing the camshaft sensor but honestly I’m lost, any help is definitely appreciated!