Hello, I disconnected the charcoal canister and used the return line for a fuel pressure regulator.

This causes vacuum to build in the tank for large wooshes when removing the cap. I remedy this by taking the seal of the gas cap so it isn't airtight. The downside is that I feel this allows gas to evaporate out if my tank.

Does anyone know a good way to let my tank vent? I cant find any vented caps.