Could be too much pump shot then. I have never run a 50cc pump on an e85 4150. Normally not needed.

Try going with a set of 042 squirter and put pink can in the back. The smaller squirter will lengthen the shot. The pink cam in the back will allow the 50cc pump to act like a 30cc. This is a big change and should see a difference. Worse or better. This will give you a direction.