[s-cars] Bucking Bronco when accelerating...

[Dave Forgie]

If you hadn't "ruled out" coils, POS and/or boost leak, I would have
pointed
 you at any or all of them.  However, unless you are 100% convinced
they 
are fine, then I suggest its probably a spark plug.  Are you aware that
the
 F5DPOR plugs tend to 'walk' out of the spark plug holes over time. 
List 
wisdom suggests checking them every oil change (at least).

Check/change the plugs and report back.