I have the msd6al II. My problem is that it will start and idle fine for a few minutes and then it will start missing and eventually die. It does not always act like this though. Sometimes it will start and idle for a long period of time and never miss a beat until I give it a little throttle, and the it will miss and run rough. I have rerouted the ignition wires away from any other wires, redone all connections, changed plugs, and changed the coil. My only conclusion is that the msd box is bad, but I'm hoping I'm wrong and one of you guys know something I'm overlooking. The status light also flashes very rapidly when it starts missing. Sorry for such a long post but I really need help asap.