What voltage is your transformer set at when running TMCC? Not enough voltage to the track? The coil does take some power to operate reliably. When a missile doesn't launch, did the firing mechanism trip? Is the foam pad original and not too hard? When you launch in TMCC is the mechanism responding? Can you post a short video of it in operation so we can see what is happening?
The problems I have found is the shock of launching one sometimes will bounce the next missile off it launching cradle. The newer TMCC versions have weak launching springs and just 'dribble' the missile a few inches in front of the launcher. I took the launching mechanism apart and used the springs from a junked postwar 6544 missile firing car. Now it launches the 'Little John' missiles into enemy territory and explode the hidden ammunition bunker!
