Cdcv gas fill up problem

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97camaroSS e30 318is Spicy #1348
Took my vent system apart to try and find my gas fill up problem. The check valve was clear, the canister had gas, and the cdcv module had gas. I got air flow in both directions through all 3 pieces. The spring moves freely in the cdcv module. I put about 4 gallons in the tank to see if I still had the problem. I was able to put that much gas in. I hope it doesn't return.

When disconnected, should the cdcv module have air flow in both directions? I had gas pooled in it when I cleaned it out
 

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