This noise is driving me crazy, please help me as to what to do. Two mechanics say that it is the K&N filter making the noise, but as you see when I pull the IAC hose off it amplifies the noise. Help please

 

I can't watch the video but is this a hollow thumping/gurgling from the intake area?

If so, I have the same issue with mine. It did it with the stock intake/filter and does it currently with the Volant on there.

Try unplugging your IAC... you'll hear one single little gurgle when the plug first comes off and then one single one when you plug it back in... clean that bish and then see what happens. I still have yet to do it to mine, but I have gone to that extent to figure out what it was.

Ironically, I have been hearing this for almost a year as it got progressively worse... I diagnosed it by accident after EVERY mechanic I took it to said that it was the intake or "I have never heard that... I don't know!?".

EDIT- I just watched the video on my phone and I think its the same noise... only yours is worse than mine.