Is your fuel cap a breathable type ? Possible breather pipe blocked with debris causing a vacuum in the tank and not allowing fuel to flow or slowing fuel delivery down.
Breather is blocked off sine I am no longer running a charcoal canister. I am using a vented gas cap. Ive been using the same setup for the past 4 weeks. If anything tank, lines etc are all better than they were and still the issue.
