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
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
