Thanks- I thought about that... it's one of those things you really don't want to hear after spending the money & doing the job... I hope that it is not the cause, but it sounds like it could be. It is 8an from tank to carb, & 6an from reg return to tank. I have heard people say not to go up (like from 6an to 8an). I figured that the return line would not matter as much.