Quote:
Originally Posted by sunman
This is a Classic Roadsters tank and filler neck. The LeMans cap has a fuel drainback line too. Plugged maybe? Fuel and return line are in the sender unit. If you don’t have one good time to add it.
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Show us a photo of the inside of the LeMans cap.....
Maybe all you have to do is put a check valve in your line and drill some holes in the sealing part of the open cap
The fuel tank has to vent to the Atmosphere