Quoted from BrianZ:Ball 1 loads perfectly. If i dont lock the ball (the mode), and it drains after play, ball 2, 3, and 4 load one at a time (per each normal play). But if I lock ball 1, when it loads ball 2, it also loads ball 3 immediately after. (note, before replacing the balls and shim, it used to do a random combo, sometimes loading 2 balls at once, or a few seconds later. the shim and ball replacement seem to clear part of it up). So I now have 2 balls stacked in the shooter lane. Even more interesting, if i left one ball drain, it still does not end the ball. At that point I have to drain both balls before it stops to play ball 3.
Is one coil activation loading 2 balls? I dont think so. It sounds like it is energizing twice. And if it were, the problem would be all the time, and not just went under ball lock.
It's bizarre.......
Longshot: Have you checked the shooter lane switch??? It might be flaky and not registering all the time. Just trying to eliminate variables here...