I am repeatedly try to fix the problem, but I can not narrow it down. Only when I am in boost do I hear the sound, its not a boost leak; I have checked it and checked it again. The sound is coming from the passenger side? Any ideas would be great, my boost is holding 22 and tapering down to 21.

 

A description of the sound, or even better... a sound clip might be helpful.

 

I dont think words could describe the sound, I have narrowed it down to: still having a boost leak, turbo going bad, bad accessory belt.

 

That is even more reason to post a clip of the issue.

 

it could also be the timing belt going bad. should have that checked as well.