I agree, it must be a lean condition. I am running the pump rod in nearest hole to carb for the longest stroke has helped a little. I just got back from a 20 mile ride and the intake plenum is dripping with condensation. I guess fuel must be doing same inside. I think maybe my design is flawed as plenum has a low dip before entering turbo to keep carb low. I am going to try and add pictures. Can not figure out how to add post pictures but can e-mail too you. Thanks Mike hschrei@siue.edu