Was getting code P0302(misfire #2), replaced spark plugs & I swapped coil#2 with #1 to see if problem would change?, Im no longer getting a code. . . but car still sputtering etc?

Hello, if the vehicle is not running properly, but you are not setting a code now, you probably will soon. You could wait for that, or you could have further testing performed -- using a suitable high quality diagnostic tool with component testing and data monitoring, you could check for cylinder balance and relative compression, would could lead you to suspect cylinders. You should probably perform a compression test on the engine to see if there is a base engine or cylinder head issue.

IF engine misfire is obvious at idle while looking at engine - disconnect wire connector at # 1 coil - IF no change in observations of engine idle - REPLACE failed coil.. Keep in mind the ‘remaining coils’ have the same age and mileage on them as well..