It's been my experience (and others need to chime in here) that any "misfire" code is more broad than a simple "misfire" and can be caused by a multitude of reasons. I have a supercharged mustang that used to throw "misfire" codes when I had the timing (mechanically) jacked up and/or would pick up that code at altitude (smokey mountains) bumping the timing back a few degrees would stop it from re-occurring.
*****************Alert*********
I have the flu so I'm sort of out of it, but I just remembered something, go to the passenger side of the engine, track the vacuum/ whatever lines around the back of the engine UNDER the battery tray, remove the battery tray and see if they have a hole rubbed into them, look closely, it will be minor so look good, this will also explain the bank 1.
This was a common issue with this body style. Sorry I didn't think of it earlier.