Dodge: code 43 on 97 Stratus

I'm doing this for a friend. He got a code 43 so he put on a new coil pack.
That was thusday, he drove to work friday and a little over the weekend. He
headed to work this morning (monday) and had to turn around. I pulled the
codes and it came up with code 43 3times. I mean it flashed
12-43-43-43-55. I've never had the same code 3times whats up? Help!
jakemurphy71