OK so I got this issue, now I dont know if its something new or mbe had not noticed before. Sounds like a boost leak and I've trippled checked the bolts / gaskets etc.

Seemed to arise when I removed the S/C phenolics... mbe its a misaligned / damaged gasket. I reused the old ones ? Anything else come to mind?

Mbe its just how it sounds now ...

Anyone ?

Hear similar? Is it normal ... ?

Change gaskets out ?

It sounds like a boost leak and since you mentioned changing gaskets - start there....pressurize the system if you want to be 100% sure...

Also, you posted a change in your exhaust (in another thread).....Are you certain you don't have an exhaust leak (pinhole leak from a bad weld) ?

The exhaust I think is ok as its more a hiss than a tick, and it was there before I did the mid section rework, and still there now.

Might be one of those semi transparent breather tubes that either dislodged or bust

And then it could be the gaskets. They have had a few re-re's in their life.

Get the MAP from the OBD2 port to confirm if you have boost loss

Good point, you might want to check the flexi's you had installed

The easiest way is spray some carb cleaner into the suspect leaking areas while the engine still running. If the rpm drops then you have a leak, if not you're fine. Good luck.

Not exactly...sometimes the leaks are only seen under boost (vs. vacuum)....Which is why I suggested pressurizing the system....

thx guys...

I'm willing to put money on it being an exhaust leak. Take it back to that exhaust shop, put it on the ramp, start the engine and feel around the flanges where they worked on/spray liquid. I'll bet that's the problem.