Card in spokes / VW sound...

[ron]

Might want to check your egr if it's loose. I had the same diesel sound for a bit when accellerating. Tighten it up will eliminate the noise if that's the issue. Do a search on loose egr on this forum. Good luck.

[Kenny]

I get a sound like that and it is the ventilation fan, not engine related.

There's a fan casing above the right foot of a passenger you can pop the bottom off to see if the sound is from that small fan.

[Y33TREKker]

Might want to check your egr if it's loose. I had the same diesel sound for a bit when accellerating. Tighten it up will eliminate the noise if that's the issue. Do a search on loose egr on this forum. Good luck.

X2 on Ron's suggestion. The EGR nut tends to come loose at times (IIRC it takes a 21 or 22mm wrench to snug it back tight. A crows foot head with an extension and a socket driver works pretty good), and adding some anti-seize to the threads allows for a more even torque.

X2 on the good luck too.