I'm not sure if this is normal or not, but I have a lot of vacuum -just after driving -in the gas tank. This is for my 1973 220/8 gasser. It seems to suck the fuel out of the carb bowl when allowed to sit for a couple days. Does this mean the fuel vent valve for the tank is not working? I have the Weber conversion carb. I don't remember this problem with the Stromberg.

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Dan
1981 240D
1987 300D Turbo
1973 220
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