Mystery vacuum line

[Hannakournikova]

So noticed a vacuum line cable tied up. Followed it to to under the engine cover. Will have a further nosey with the rain stops. 
Any ideas?

[Hannakournikova]

And photos

[Chris92]

Looking at where it's coming from I'd say it's a vac pipe for a boost gauge

[Hannakournikova]

went outside and braved the cold to investigate. Seems to go down towards the turbo.

[Chris92]

Probs running through the bulk head down there

[Hannakournikova]

Though the grommet would be higher up. Needed to check canbus tomorrow so will have a nosey.

[GTI-Pirelli]

Do you know if you definitely have an OEM diverter valve on the turbo?
Forge units operate using a vacuum that would follow that route between the valve and the intake manifold. Or as others have said for a boost gauge.

Obviously not my image. The pipe running from the vacuum tap (lower right of the manifold) and cable tied to the metal pipe (fuel rail?).

[r5gtt]

^^^^

I was also thinking that but didn't know how this was possible until now hahaha

[Hannakournikova]

where is DV located?
that the one best accessed by removing drivers wheel?

[r5gtt]

Yes it's meant to be on out k03 turbos. ko4 have them in you're face like a 5 minute job to replace lol

Yours may have a lovely relocation kit fitted but you'll need to take the engine cover off and take a picture for someone to say yay or nay.