Weird off-throttle and mid-throttle noise

[wmjosiah]

Hi all,
The mid-throttle noise was definitely from the vent in front of the gas cap - my son and I pinpointed it while driving around with the top down today - Rich XTR called it, though I didn't see this until now. I got a better recording of the noise: http://insanetechnology.com/2018_02_26_17_04_42.mp3
I stuck some wadded-up paper in the vent and the noise is gone. However this noise isn't at idle, just mid-throttle at any RPM, and it goes away if I get on or off throttle. Purge valve, think ye? I wonder if it might take care of the little off-idle squeak which is definitely coming from the intake (I can hear it clearly with the engine cover off) too, recording here: http://insanetechnology.com/2018_02_26_17_09_26.mp3
Thoughts?
Thanks!

[wmjosiah]

I guess the question is do I do this the vent line with valve, part # 996-110-129-06-OEM
Or this:
https://www.eeuroparts.com/Parts/79509/EVAP-Purge-Valve-99620114301/?gclid=CjwKCAiAoNTUBRBUEiwAWje2lvzVwPOP-4DD1Dd2hDsnLbbV1gQTirDwOvMG3f8ueQppCD2YnN2YjhoCNWQ QAvD_BwE
Or the Vapor canister purge valve, part # 996-605-201-01-M244
First? Or something else?

[wmjosiah]

After reading up on this a bunch more, I came to the conclusion that there are a lot of valves in the system that can get stuck. Hm. Stuck solonoid valves gummed up with who knows what in such a way that causes them to suck air into the intake... OK, let's spray some throttle-body/intake system cleaner in there. Did that, took it for a drive, a bit later, when it usually makes the noise, I could clearly hear it open, suck the liquid into the system, and then... no more noise. I drove around for five more minutes and heard it open one more time, much smaller noise. Stopped, sprayed some more in, drove around for another 10 minutes, no more noise. This may, obviously, not be a permanent fix. We'll see.