Before I added it I was getting vapor lock symptoms, so I added the electric pump, and by-passed the mechanical. The pump is an inline, close to the tank, new out of the box. Have a Holley 4160 390cfm 4bbl carb. Have a regulator right before the carb set at 5. Took it out for a while, and when I get on it, I quess all barrels, it bogs down hard and turns off. I turned the psi up to 5 and it idles fine and drives fine at slow regular speeds, but when I go up hill or fast, boom, turns off. Down hill it was fine, even when I got on it. Any ideas?