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Model specific boards => Golf mk4 => Topic started by: jonnyturbo on 10 January 2009, 17:39

Title: N249 bypass - Done
Post by: jonnyturbo on 10 January 2009, 17:39
Well first of all like to say a big thankyou to  ( matt ) northeastgti for helping me with my n249 bypass. Car is much better dosent hesitate and boost feels much stringer. Also it looks like stock as  we tucked everything away  Now just need that sports cat and downpipe and that revised map from nick :smiley:
Title: Re: N249 bypass - Done
Post by: Wazzzer on 10 January 2009, 17:44
so what's the advantages of this then and how do you do it? Or am I gonna get a telling off for not using the search function  :grin:
Title: Re: N249 bypass - Done
Post by: jonnyturbo on 10 January 2009, 17:56
Yup a big telling off lol/ Haha no man. the advantages are it dosent hesitate under boost. Mine used to cos it was throwing up a n249 fault which would not clear. Now the bypass done it has cleared with vag com. My car felt as tho it was holding back a bit and it dont now woohoo. Lol wait untill matt comes online think he got pics :huh:
Title: Re: N249 bypass - Done
Post by: northeast_gti-t on 10 January 2009, 22:49
Hi jonny

good to hear your happy with our work today even tho it was bl***y freezing :laugh:your golf felt pretty sharp after and forgot to tell you the ecu will adjust for this with a period of driving  :smiley: nice car you got to m8 tho your gona cost me more money now  :grin: with me seeing your boost gauge i liked looks like thats next lol oh n yep get the 3"downpipe and sports cat on you know you want to m8

(wazzer) some pics of the n249 by-pass mod taken of mine after id done it forgot to take some of jonnys :rolleyes:
 
Before:
(http://i466.photobucket.com/albums/rr30/northeast_gti-t/Photo-0095_engineforgefmcl007p.jpg)

And Now:
(http://i466.photobucket.com/albums/rr30/northeast_gti-t/Photo-0136_enginen249valvemod1.jpg)
(http://i466.photobucket.com/albums/rr30/northeast_gti-t/Photo-0135_enginen249valvemod1.jpg)
(http://i466.photobucket.com/albums/rr30/northeast_gti-t/Photo-0134_enginen249valvemod1.jpg)
(http://i466.photobucket.com/albums/rr30/northeast_gti-t/Photo-0137_enginen249valvemod1.jpg)
Basically removes and by-passes the vacuum resovoir for the n249

matt
Title: Re: N249 bypass - Done
Post by: northeast_gti-t on 10 January 2009, 23:15
Look here for some details
http://uk-mkivs.net/forums/p/213950/1381524.aspx#1381524 (http://uk-mkivs.net/forums/p/213950/1381524.aspx#1381524)
Title: Re: N249 bypass - Done
Post by: T_J_G on 10 January 2009, 23:36
It says on that guide if you actually remove the N249 valve by disconnecting a metal line the ECU ' throws a wobbly..'
Title: Re: N249 bypass - Done
Post by: northeast_gti-t on 11 January 2009, 00:21
It does but the metal line and the connections are left on the car connected up its just the vac res thats bypassed the electrical sides still physically there just vacuum side bypassed/removed

matt
Title: Re: N249 bypass - Done
Post by: Ivor Mk4 Turbo on 11 January 2009, 01:09
Quote from: Wazzzer on 10 January 2009, 17:44
so what's the advantages of this then and how do you do it? Or am I gonna get a telling off for not using the search function  :grin:


Not applicable to you mate, so I wouldn't worry about it. ;)
Title: Re: N249 bypass - Done
Post by: Wazzzer on 11 January 2009, 12:09
ah another AUM/AUQ thing then? :grin:
Title: Re: N249 bypass - Done
Post by: kcolevol on 11 January 2009, 12:42
Quick question, great mod by the way.

I have removed my dv completly and blanked off the dv vac, so ...... am i basically getting the same mod here?

thanks,
Title: Re: N249 bypass - Done
Post by: Rhyso on 11 January 2009, 12:59
Quote from: kcolevol on 11 January 2009, 12:42
Quick question, great mod by the way.

I have removed my dv completly and blanked off the dv vac, so ...... am i basically getting the same mod here?

thanks,

urm im no expert but removing your DV completely doesn't sound good!!!
Title: Re: N249 bypass - Done
Post by: vapor matt on 11 January 2009, 13:07
Quote from: Rhyso on 11 January 2009, 12:59
Quote from: kcolevol on 11 January 2009, 12:42
Quick question, great mod by the way.

I have removed my dv completly and blanked off the dv vac, so ...... am i basically getting the same mod here?

thanks,

urm im no expert but removing your DV completely doesn't sound good!!!


As said above, I wouldnt remove your dump valve mate, you will damage your turbo and engine if you over boost! the whole reason for a dump valve is to control over boost!
Title: Re: N249 bypass - Done
Post by: northeast_gti-t on 11 January 2009, 14:22
As said dump valve isnt meant to be removed its there for a purpose ie to bleed boost back into the system if youve removed your dv? where have you/how have you sorted the pipes from the dv removal?

matt
Title: Re: N249 bypass - Done
Post by: kcolevol on 11 January 2009, 18:37
No i been running it like this for a year just over, no probs (yet). I got the dump valve vac blocked off, the hard pipe boost hose is capped and a blanking plug in the intake pipe.  The boost pressure is still going through the exhaust as it would if there was a recirc on it anyway, the car idles fine and boosts still to my remapped 15 psi, never over boosted yet.