VTCS Delay Valve

I inspected mine earlier according to the FSM. It pretty much says you should be able to blow from the green to the black side, but not vise versa. Well, I was able to blow from the green to the black side. But when I blew from the black to the green side I was able to push through a very small amount of air (if i stick my finger over the green side I can build up enough pressure and hear it when i let go). Is this normal operation, or should I not be able to get any air through at all?
 
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