Turns out, it really IS a Ford.
My husband did the mistake of taking it to the dealer. The plunger was cracked, and it needed an oil change. So, figured he would take it there to just get it done. Changed the oil/filter, plunger, and fuel filter. Within about 100 miles the intercooler line blows its connection. Reattached, blows again. Cleaned - thinking, the location of the line may have meant they detached it and got greasy grimy paws on it... when it built pressure it then didn't hold, so cleaned and reattached. Blows again. Fuck.
Limp home - figured it's "just" unfiltered air going into the turbo - and since we're on the pavement rather than dirt we'll check it out at home. Get home, damn truck is now only idling at 500 - rough. I call the service manager, and he sends a truck to pick it up.
I'm unhappy. Damn Dealer. Of course, I'm completely expecting him to come back with some widget that they possibly couldn't have touched that just coincidentally happened to die when they did an oil change. Of course.