Losing fuel pressure on new setup

Tomorrow before work i will check out the vent system. But i was also wondering do you think the gas is the issue? Im in wisconsin and maybe were still getting rid or winter blend since it dips in the 40's over night. Im using 93 octane with 10% ethanol. Thats the best i can get around here. Someone tell me im being stupid so i can move on to the next thought...