Originally Posted by Nick_ll
Part #8 on this diagram.
As far as I know, this valve generally doesn't fail, it gets dirty and you can clean it up with throttle body cleaner.
I would however doubt it and look more towards the vacuum lines that get to/from it.
I tried to identify the location, it seems like the sound is coming from this unit. I'm not sure if it's the unit that's failing or the connections around it. I'll take it apart and clean it up to see if it works.
Thanks again. I'll post an update right after.