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Model specific boards => Golf mk4 => Topic started by: rfn_hodgson on 05 August 2013, 20:21

Title: what is this for??
Post by: rfn_hodgson on 05 August 2013, 20:21

hello felles i have seen a few mk4 without this... its the black box on top of one of the coilpacks

(http://i1057.photobucket.com/albums/t395/rfn_hodgson/null-11.jpg) (http://s1057.photobucket.com/user/rfn_hodgson/media/null-11.jpg.html)

what exactly is it for?/

Title: Re: what is this for??
Post by: oceanic-green on 05 August 2013, 20:30

if I remember correctly it is called the vacuum reservoir. I got rid of mine when I did the N249 delete.  I think it was the N249 delete.

Title: Re: what is this for??
Post by: Gti_Jamo on 05 August 2013, 20:42

As above, its stores vacuum to operate diverter valve if needed. Its removal gives a crisper dv noise through the induction. Its removal requires a bit of reworking of the vacuum piping and a resistor fitted but plenty guides around on n249 removal.

Title: Re: what is this for??
Post by: Nino on 07 August 2013, 10:28

^^^ its only found on the AUM engines, as above it stores a vacume of air for the n249 valve that controls the DV. I'd recommend doing an n249 delete/bypass (see the how to section) by doing that your DV dumps atmospherically as apposed to "controlled" by a valve which often fails or dumps too early. You will also feel slightly better throttle response.  :)

Title: Re: what is this for??
Post by: rfn_hodgson on 07 August 2013, 10:44

mine is the AUQ block and thats a pic of my engine and im waiting for some piping to turn up so i can do the n249 delete :) love little projects like this :)

Title: Re: what is this for??
Post by: brewey on 07 August 2013, 13:46

Quote from: Nino on 07 August 2013, 10:28

^^^ its only found on the AUM engines

I have the reservoir on my ARZ.

Title: Re: what is this for??
Post by: Nino on 07 August 2013, 19:29

My bad, just going by what I was previously told  :undecided:
However the rest of my statement stands  :nerd: