I've been pounding the hell out of the search feature (pro-tip to those using search, I actually have better success with Google: search site:focusfanatics.com *problem here*)
Sounds like it might just be the plugs crapping out from the valve cover gasket leaking. I've got the gasket and Motorcraft SP-463's on order at my FLAPS (of course, no one stocks SVT parts), but I might pick up a close-enough set of plugs tonight at Wally World just to see if that's what it is.
From reading threads, CPS should always throw a code when it goes out, so I'm ruling that out for now.
Still could be a fuel/injector issue, but plugs are much cheaper so I'll try those first.
Mine: 2006 Mazda3 s GT Hatch: 115k, Gray, Manual
Gone: 2002 SVT, #1654
Hers: 2012 Focus Ti Sedan: 55k, SGM, Manual