Would be interesting to find out if you were on the absolute ragged edge of that pump not being enough and Ed found it's limit because of his weight difference. He's fatter than you too so he's gotta haul all that around as well. If that works out to be true, that means yours should have possibly sped up with the pump change. Did it? I'm stickin by fuel on this one. Whether it's the pump or not is difficult at best to diagnose online, but I think it's fuel somewhere. The pump is the source of the pressure though. All us hollerin fuel could be slam wrong.....but I'm old school and like to stick with the tried and true first and eliminate that and then move.......and that hasn't been done yet.