VW Jetta 2.0 Mark IV Engine Noise on Start Up

Having some issues with engine noise on my 2.0 Jetta. Seems like it's an exhaust valve or vacuum issue (secondary air pump), but not sure how to diagnose.

Vortex Engine Noise Thread:

http://forums.vwvortex.com/showthread.php?2866451-Engine-Loud-on-Morning-Start-High-Idle-and-Noise

Secondary Air Pump:
https://www.youtube.com/watch?v=l269Fj12qy4