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- Oct 16, 2014
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I'm only assuming that a vent / return line is needed. Every car I have owned had one. I don't mind having some gas sitting in the fill tube/hose upon fill up. But there needs to be a high point above which fuel will begin to flow back to the tank. That would keep me from running raw gas all over the quarter panel and trunk seal...Oh, I must have misread your post.
I have the same fill cap, but when I filled up at the gas station, gas would back flow out of the filler. Guess I need to put in a better vent for the fuel cell to keep that from happening.