03 Boxster S...what is this sound ???

[Pete03]

Take a listen to this video and let me know if you've had this problem or what you think it may be. Thanks : )

https://youtu.be/c8v8lsIujVc

So here is what happened:

1. I heard this noise with no other symptoms, I thought, coming from the tank, no brainer, its the pump. Replaced the pump...easy. Did not solve the problem.
2. Still no other symptoms other than the noise Then I did some more research and found the comments about the Fuel Tank Vent Valve on Filler Neck, (aka Bleeder Valve), I changed that. Did not fix the noise, AND I was able to fill the tank once but last time I tried to fill the tank it wont accept the fuel.
3. So now Im looking for help. Any help is appreciated.

Thanks. : )