1995 Mercury Mystique, 2.5 V6 ATX, original owner (100,000 miles) - long time reader first time poster

I like the idea of the coil, and have experienced this problem on older vehicles with a single coil. I think this vehicle has three coil packs and could it be possible for all three to fail or fault at the same time? I can do a spark test next time it dies, but the problem seems like a sensor / fuel or fuel delivery problem.

Work I have done recently (thanks to this forum) in an attempt to fix the problem:

check for vaccum leaks with carb cleaner (none that I could find), replace spark plugs OEM, replace fuel filter, TB EGR passage cleaning, IAC cleaning (idle was always fine though), Test IAT sensor - tested fine, Replace ETC sensor (the one I pulled tested fine but replaced anyway), Replace PCV valve (check rubber hose - ok)