V8Freak Posted March 6, 2017 Share Posted March 6, 2017 So I am almost done restoring my car. Out fuel in it had it run I g so that was good. Sat for a day and fuel started leaking out carb from built up pressure in the tank. I ordered a non vented tank but got a vented fuel cap for it. What is going on?! Why am I getting a pressure build up?! Please help Link to comment Share on other sites More sharing options...
mrj52 Posted March 6, 2017 Share Posted March 6, 2017 Need to get a non vented cap for it. In gas tank speak a vented cap means the gas tank has a charcoal canister to vent the tank, in other words the cap is air tight. Or the other way is the tank has no charcoal canister so you would need a non vented cap, A breathing or non air tight cap. I know, its stupid but that is the way of the early emissions world. Link to comment Share on other sites More sharing options...
V8Freak Posted March 6, 2017 Author Share Posted March 6, 2017 Ha well I guess that would make sense. In my head when I'm thinking I need a cap for a non vented tank that the cap will have to be vented but your terminology makes sense that you would want a non vented cap for a non vented tank... just sounds weird that a cap that actually vents is called a non vented cap Link to comment Share on other sites More sharing options...
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