If my truck sits for about 4 days then I go to start it starts right up and dies. I can start it again if I crank and crank with the pedal to the floor. It only does this when it sits a for 4 days. Otherwise it runs fine with plenty of power. I believe that the input to the IP is leaking as the line can be wiggled quite a bit and I have already tried tightening it. I can't visually see any fuel leak but the valley pan always has a bit a fuel laying in it. The gas milage isn't even bad, so I think its only leaking down when it sits. Does anyone know the size of the fitting so I can just put a nipple on the IP and run a rubber fuel hose to my filters?