This is condition is commonly called 'Hot Legs'. It refers to the leads from your coil to the posts. The cause is usually caused by the 'leg' being too long. To fix, move your coil closer to the posts, making the leg(s) shorter. That should fix any hot leg issues. Another cause may be due to some parts of your coil touching the base or posts. In addition, make sure your wires are secured, retighten you screws and check for cut / broken wire as well. Without any other information, I'm assuming your
coils are the same size and wraps. If not, you need to fix this.