WELL, i am not a ford tech....but i ate one for breakfast....or something like that..
been there done that. you have (could have) a multitude of issues. i went thru the same boat: turbo(s), egr(s), harness(s), egr cooler and - wait for it wait for it- head gasket(s) issues.
i'd suggest find a good dealer you trust, take it in, have them test drive, pressure test injectors, and everything else and they SHOULD give you the result. either way, doesn't sound good for you.
good luck, let us know