First I would agree with the other guys check all your lines real good.
I am not sure how your tank is set up, Have you cleaned it out lately.
It could be suckin trash off the bottom of the tank and makin it starve for fuel.
Are you using Mech or Electric fuel pump? Next there is a lot of water in the Ethanol
that they are putting in the gas now, you may want to make sure the fuel bowl is not half full of water. I just had to order a new carb for my wifes vette because of the Ethanol had that had white stuff like you get around your old fawsets.
It was all thru my carb,with alot of the white crusty stuff in the fuel bowl.
The Ethanol will also eat up rubber hoses and put all kinds of debre in the fuel line and carb.