number 4 cylinder is miss firing on 2005 Chrysler Sebring

already tried coil pack new plugs and plug wires what elese could it be

Check # 4 injector pulse with noid light. If pulse ok prob. bad injector.
Repair shop can do an injector balance test as well. (Best test)!
Oh, there are TWO 2.4 engines by the way. SOHC and DOHC. Info. should be the same for both in this case.
1 more answer , 2 more comments
maybe you should do a compression check
Maybe you should tell us which engine is in the car!
it has got 2.4 in it