Sounds like the fuel pump relay is going out. I think the MAF connection is just a time killing coincidence that gave the relay time to cool. The relay is under your seat, and is subject to heat, just like the rest of your floorboard. Heat is not a relay's best buddy. If it's the original relay, replace it. 13 years is very old for a relay that is used every minute of vehicle operation. Codes could confirm this. Pull and post them.
Take care
~Chris
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Retired Moderator
MustangNet
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RACECAR spelled backwards is RACECAR
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