Not Ranked
Yes, the MSD requires 12.5 volts to fire..and fire volts are supplied by the alternator, not the battery. I run MSD (the old Ford SVO stand alone ignition) and I know that NO battery will hold 12.5 volts under a load test! It's optimum charge is 12.75-12.5 volts, which means that it would have no voltage drop under load! A battery will regularly drop below 11 volts with a severe draw, and still start a car! I really believe that the problem presented here is either fuel or ignition related. I would lean toward a fuel problem as the first thing to check, just because it's the easiest!
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"I think we have more machinery of government than is necessary, too many parasites living on the labor of the industrious." Thomas Jefferson
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