No still needs a vent. When that fuel heats up going around that engine it still heats up. and you need the expansion in the tank as well as leaving it out ins the sun all day.
When you fill it up you put in cold gas from the tank underground. and it you don't drive it far and park it. its going to expand as it heats up.
and when you use fuel it has to be replaced by air so it has to vent in as well even on a return style system. This may be the issue this thread is working on.
Last edited by hcb3200; 05/03/2024 2:36 PM.
