Removing N249 valve - How To Guide

[Rogge]

Perhaps a bit old thread, but here's a 'maybe' answer

I think all the DBW cars have this N112/N249 combo. Just to give te ECU the control over your boostpressure. I think it used when the car goes in ABS/TCS state, or when you hit the brake will keep on the gas (can't be done btw). When the ECU detects this state, he will cut back the power (DBW) en therefor the boostpressure must be cut back also.

Other explanations or comments are welcome

Good point Glen, which is what myself and Damian were asking ourselves, along with Pete from Seatowners as well

if this N249 valve has been put there on later models, it must be there for a good reason......otherwise why put it there

surely removing this must have some sort of effect or it is obviosly there to control something for safety reasons, but what for exactly

i am all for removing it, and i have read on other forums (Vortex mainly) that no error codes etc have been produced from VAG com, but still i am a bit sceptical as to what harm/damage this can do to the car, manufacturers dont just put these things in to be removed, well to a point anyway

dont think i have seen anyone quote and answer Glenns or Petes queries, although not read the whole thread

so could anyone perhaps look into why VW have put this N249 valve onto the later models and what effects it has removing it, apart from improved performance but i mean engine reliability, hope nothing to worry about as i really want to do this though

cheers

Tony

 

[Deleted member 9043]

is it ok to put the vacuum from the check valve on the vacuum of the fuel pressure regulator?

so you have a straight vacuum fromm manifolt to dv?

ive done this mod to now and car feels way good

 

[Martyn]

Sim, pics are down again mate

 

[Martyn]

Sorry to dig up an old thread again but i've just done this on my Ibiza and it's great! Car seems alot smoother on WOT and on part throttle

I'll upload some pics in a bit!

 

[PhilW]

Martyn, what was your reason for removing it? Just thought you'd try it?

 

[Martin CUK]

I've been thinking about doing this too, seems a worthwhile mod.

How easy was it to do Martyn?

 

[Martyn]

Phil, been wanting to try it for a while, it's definately gonna stay bypassed now.....just need to see if the car does the 'stalling' thing now.

 

[Martyn]

I'll upload the pics, took me about 5-10 mins max

 

[PhilW]

Cool, is it still stalling then?

Any more thoughts on that MAF/tip thing i mentioned?


I'm tempted to do it to clean up the engine bay more as well as tryin to sort my stalling thing.

 

[Martyn]

Pics can be found here....

http://www.seatcupra.net/gallery/main.php?g2_view=core.ShowItem&g2_itemId=1532

Phil, not tried to make it do the stalling thing yet...will give it a go later.

Excuse the dirty engine lol.

 

[DPJ]

Martyn,
Is there any chance you could briefly put into words what you've done?

 

[Martyn]

Dave, take a look at the first page of the thread for the 'how to' matey. Sim explains it very well. The only difference being I didnt ditch the unused parts (I left them there just not unconnected mechanically - Electrical connection to the N249 valve is still in place)

 

[DPJ]

Dave, take a look at the first page of the thread for the 'how to' matey. Sim explains it very well. The only difference being I didnt ditch the unused parts (I left them there just not unconnected mechanically - Electrical connection to the N249 valve is still in place)

Got you. You didn't make/fit resistors. I'd read and understood Sim's guide ages ago, just wanted to see if you had done something different. Thank you!

 

[Shock_Xe]

done this mod to my car and adams nearly a year ago, no probs what so ever

 

[Mark@VAGWORX]

Good pics Martyn.

Does anyone have any pics of the setup, when:

* The N249 and vaccum bath are moved completely
* When you're running a K03s etc

Thanks in advance.

 

[Martyn]

CupraT, take a look at the first page of this thread matey, Sim is running without the N249 and Vac unit. Pics should be there too...

K03s wont make any difference to the setup/layout.

 

[ibizacupra]

Good pics Martyn.

Does anyone have any pics of the setup, when:

* The N249 and vaccum bath are moved completely
* When you're running a K03s etc

Thanks in advance.

 

[Mark@VAGWORX]

Thanks Bill.

Thanks Martyn.

 

[Daz_gibbo]

Def. looks alot tidier!

 

[claudefrog]

Dave, take a look at the first page of the thread for the 'how to' matey. Sim explains it very well. The only difference being I didnt ditch the unused parts (I left them there just not unconnected mechanically - Electrical connection to the N249 valve is still in place)

does that mean you never used the resistors? just left the n249 connected and removed the rerouted the vac lines?

Thanks