How do you fix the vapour lock in gas tank when filling up?

To fix vapor lock when filling up a gas tank, try to fill the tank slowly to minimize vapor buildup. Keeping the nozzle in a lower position can help reduce the likelihood of vapor lock as well. If the issue persists, check for any blockages in the fuel system or venting, as proper airflow is essential for preventing vapor lock. Additionally, consider using fuel additives designed to alleviate vapor lock issues.