My 2010 Chrysler Sebring 2.4l began misfiring so I changed all 4 ignition coils and plugs. It still ran rough. I rechecked the coils and plugs and all was good. I ran a diagnostic and it came up cylinder 1 misfire as well as crankshaft position sensor code. Now when I try to start it up it does nothing but appears to have full power from the battery. My next move is to test the battery/alternator but open to any other suggestions.