Re: 07 mustang dies while driving starts back up and drives
Ignore the advice about the distributor, starter and ignition module. Your car doesn't even have a distributor, and if the starter is turning the engine over, it is most likely functioning properly. The "ignition module" is your PCM.
Do I understand you correctly? The car only dies once or twice a year after sitting all winter? If this is the case, then sitting all winter without proper precaution is probably what causes the problem. Fuel will get stale, your battery will lose charge and fuel varnish will form on the throttle body and fuel injectors. I'm surprised that it only stalls once, or even occasionally, after sitting for so long.
If you cannot drive the car long enough to sufficiently warm the oil (to boil off condensation moisture inside the engine, exhaust, and electrical connections, which could affect the torque converter lock up, mentioned by Catskinner and JWKO) and charge the battery during winter, at least, use fuel stabilizer and trickle charge the battery. Cars deterioate rapidly when sitting for lenghty periods.