Hate to tell you, but that's the same symptoms my car had... that resulted in Ford replacing the engine under warranty.
Mine was a completely stock 2012 GT (no tune or any other mods) at 23700 miles. The service replacement engine for my car was what they put in the 2013-14 GTs, with the coated pistons, additional ring gas ports, and different head bolts.
I haven't heard of many blown-up 2013-14 engines, but with boost and some road course time, I could see it. I certainly hope that's not the case for you. Good luck.
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"If this was like, a thousand years ago, I'd be a Picasso. I'd be one of those dudes that cut his damned ear off."
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