cylinder misfires new Denso spark plug damage
 

2001 Audi b5 s4 2.7t started with code P0300 replaced coils plugs and ICM's still has a misfire and runs rough drove it around the block checked codes and code P0301 pops up check plugs and the cylinder 1 plug electrode ground was gone used Denso IK20TT spark plugs . The misfire started on the way home from work under normal driving conditions . not sure what to check next could it be a lean condition problem ? or something else ?