Why would a Holley squirter have an effect on AFR? I've been fine tuning the pump circuit and I got it pretty good, but it goes pig rich at transfer, which I know has to do with several circuits, but why would me changing from a 28 squirter (idles at 13-13.5:1) and dropping to a 25 squirter (AFR goes to 17:1 idle). I've never had one do this before. Absolutely no other changes.