Well i have been putting up with this for a while, but basically my fuel tank is being pressurised.

So when opening the filler cap there is a massive rush of fumes/air and one time i opened it i had fuel pour out of the tank.

My current setup is:

stock adm tank
carter lift pump
shakotan garage surge tank
040 bosch pump
going to a stock 20v

I have the charcoal canister hooked up to the breather line on the tank, and the output of the charcoal canister is hooked up to one of the vacume lines.

I dont know what the go is, i did change the fuel cap changed for a bit then started to pressurise again.
Any ideas?