With an altered fuel setup I would guess it would have something to do with that. A simple test to see if you are getting good fuel pressure is to take the "w" connector on the right side of your fuel rail off and crank it over. With some good fuel pressure it should come out like a water hose. I'd recommend bringing a few rags. Also, it's pretty cold where you live so putting in ~1 bottle of Heet in your tank (when it's full) may not be a bad idea.