Why does my Dyna S spark continuously when I am charging the battery? Matt May 23, 2018 18:28 Follow Battery chargers constantly switch between high and low voltage. The Dyna S see’s this as the ignition being switched on and off resulting in the constant spark described above. Related articles Installation instruction for MAP sensor for PTI units Dynatek Downloads What coils should I use? My motor stalled and the red LED was flashing continuously. What is wrong? Comments 0 comments Please sign in to leave a comment.