It has to be the cold air (in combination with mods). If it's below 54 degrees, it starts doing it. The colder it gets, the more it acts up. With the stock BPV on, I do not notice it, but I have noticed in a couple situations that there is a slight loss in power at times with the stocker. This to me seems like it is leaking. It leaks before I get to the point of getting the fuel cut.
I really hope that the BCD helps, but I am thinking that it will not.
Laloosh, when you get your parts, would you mind tossing on the fuel pump before installing the EMS and seeing if that takes care of the issue for you? That would be awesome.