I'm not sure if this has been posted here or not, I tried digging around and couldn't find the info.
Anyhow, figured I post this here, and
all thanks goes out entirely to fellow EBPF member Blaine109 for having been the 1st to discover this issue & complete a post about it. 
As far as I am aware, FMC (Ford Motor Co.) has still yet to officially acknowledge this problem, and it has been know to not only affect 2010-2012 EB owners, but there have continued to be reports of 2013 owners noticing / experiencing the same issue.
Essentially, on the driver's side of the engine block, sandwiched between the air intake plumbing, and near the thermostat housing, there are two wires, where the loom is simply not long enough, and those wires lead to one of the knock sensors.
These wires rest on the block, and over time, the insulation wears away / chaff's, exposing the wire itself, which in turn either shorts out, or at the very least, sends incorrect signals / info to the ECM and the engine retards itself.
Below is the info (and pictures) that were originally posted on this, and again, thanks to Blaine109 for his discovery, his contributions to the EB community, etc.
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"So I got a call today from the service manager with some "news" on my situation. The data that he sent up to Ford was analyzed and they noticed that just preceding the opening of the wastegate one of the knock sensors was reading about 500 ticks more than the other knock sensors. What does the computer do when it detects excessive knock? It cuts power to the engine so that it doesn't go BOOOOOM!!!! Interesting. So, the engineer told the service manager to inspect for a chaffed wire. If one could not be found he was to replace the knock sensor giving the excessive readings.
So I immediately headed over to the dealership so we could start looking. After giving the engine 10-15 minutes to cool we started digging. And what did we find? If you said a chaffed wire then give yourself a cookie. The wires go to one of the knock sensors below the intake manifold. You can see that wires that come up into a connecter and were not wrapped in any electrical tape or in any type of protective plastic shrouding and it was resting right on a 90 degree edge on the engine.
This would explain how my issue started as a once and a while issue and degraded into a full-time issue as the chaffing progressed and got worse.
First remove the engine cover just to make sure it's out of the way so you can get a good look from all angles. Look down between the 2 intake pipes.
See / Refer 1st Attachment Below
We saw a connector with wires that were not wrapped in any extra electrical tape or plastic shrouding.
See / Refer 2nd Attachment Below
From this angle you can better see the wires resting on the engine.
See / Refer 3rd Attachment Below
The chaffing is on the sensor side of the connector which means that they will have to replace the knock sensor. In the meantime we have put a piece of foam insulation on the engine where the wires rest to prevent it from further chaffing and giving false knock readings. I must say that performance is starting to come back. Since we didn't reset the KAM memory, it is taking some time for new values/averages that the PCM uses to run the engine are being used and faded out as new values are factored in and averaged. Power is coming back, the erratic RPM's are fading, the wastegate is bleeding off less and less air with every mile I go.
The new knock sensor should be in Tuesday but depending on what time it comes in I may not get my car back in there till Wednesday. I will have them reset the KAM and also check to see if there are any more software updates available to get me all up to date on everything.
I'll report back Sunday/Monday as I put more miles on my car to let you know if the condition continues to get better as well as what it's like when I get the new sensor in. I will be taking a road trip tomorrow so I will get to get a good like to see if my HWY MPG's are improving. With this issue I was only getting 21 - 22 MPG tops on the HWY when I used to get 26-27 (while driving 80MPH - 90MPH).
Now I would suggest that all of you go out and check for those wires. If they are exposed I would inspect them for any chaffing and then I would recommend wrapping them up in some electrical tape or other means of protection."
