|Originally posted by Tstang429:|
Ok this is gonna sound weird drive around with the gas cap off see if it makes a difference. Maybe a vents not working or blocked off and you getting a vacuam.
I've had the mechanical fuel pump in my old Caprice suck the fuel tank halfway flattened when there was a vent malfunction. I opened the gas cap and I heard a Kaa-BONG!! as the tank popped back.