Removing N249 valve - How To Guide

[flashbsd]

top job, im leaving the unit in situe, just bypassing it. cant be bothered

 

[davidol]

can you make me one? lol

 

[Forbez]

I'll take one too.

 

[Sim]

Hi all! I'm happy to see that you all are satisfied with the results.

 

[Craig!]

Just fully bypassed my partial bypass with new 4mm ID vaccume pipework and it holds more boost and the dv reaction is faster.

 

[GaryM]

so let me get this straight, you bypass the unit, but instead of using resistors, just leave the unit connected, and even though theres no pipes connected, it may still operate and not affect anything? I think ill do it this way

Will this give all the benefits the full conversions? leaving the reservoir in place and connected, just the pipe bypass?
I assume it will.

 

[davidol]

yeah it'll still have the full effect, throttle response is greatly improved IMHO, i removed the tank however and then screwed the N249 valve to a bolt on the back of the rocker cover (saved me having to extend the wires) and then relocated the N112 valve to the scuttle panel.

 

[flashbsd]

davidol, id remove it from the back of the rocker, mine fell off (metal bracket cant withstand that much heat above the turbo and manifold)

and it ended up melting itself to the turbo on the M25 and smoke everywhere.

Ive just tied it on top of the rocker inwards with cable ties as a backup.

just a word of warning

 

[Simon L]

After doing the bypass, I've just left the 2 valves where they are, but removed the reservoir, its seperate and can be removed.

 

[davidol]

yeah jonzy didnt suggest it either but i think it looks pants sat on top of the engine and i didnt really want to cut any wires i didnt have too, i will move it at some point or pack out the bolt with some insulated washers to stop the heat transfering

 

[Radek]

You may cover it, but not neccessary. If you use any kind of cap/cover make sure it is not clogged/closed completely, otherwise the combi valve (and wastegate on ibizas) will stay opened!

Ooppps.
One of the vacuum hoses of N112 was broken off , so hose has been replaced in service . I didn't know why one of the nipple is open there , so we shut it completely . That's bad , isn't it ?

 

[Sim]

N112 opens the Combi valve in the head (and opens the wastegate in mk3 ibizas at the same time) using vacuum when energized (12V switched there). When not energized (default state) it will RELEASE the vacuum to the atmosphere on the third unused/open nipple, so the combi valve (and wastegate on mk3 ibias) can close. Originally there is a little black or grey cap on the unused nipple of the N112 to prevent bigger dirt particles to be sucked in (when vaccum is released from the combi valve). That's all. It seems to be unused, but actually it is used by letting the vacuum to escape when not needed anymore.

 

[beattie17]

yeah it'll still have the full effect, throttle response is greatly improved IMHO, i removed the tank however and then screwed the N249 valve to a bolt on the back of the rocker cover (saved me having to extend the wires) and then relocated the N112 valve to the scuttle panel.

You got any pic's of ur's?

 

[RickC]

is there one of these on the LCR ? too dark to go and look now lol

 

[PhilW]

You got any pic's of ur's?

I have....

 

[beattie17]

cheers i was looking at this yesterday what exactly do i remove pipe wise?

 

[MC20VT]

Hi guys,

i removed n249 valve and the news connections are these:

is this right? the check valve directions is right?

if i make a check with vagcom always appears the n249 mechanical malfunction.

I added the 30ohm resistor (i'm an electronics technician..)

and sometimes appears n112 error, incorrect flux detect.

(with check valve turn right or left..)

any suggestion?

 

[pickie]

do we have any RR graphs and vag-com logs of before and after the mod ???

also what are ppls feelings of this mod, now its been out for a while ???

is it worth me doing this mod ???

also limp mode ?? how is that combated if you get it after doiung the mod

cheers

pickie

 

[slimjimvw]

Ive finally completed the loom

Proper AMP connections used, booted to stop damage.

The whole thing is braided and uses 8amp cable.

All joints are double heat shrinked, the whole thing is a metre long.

Need a little more vac pipe and make a bracket up to hold the solinoid in place in the scuttle and then I can write a proper guide.


And before anyone starts tapping out 'Can you make me one' - theyll set you back about 18 quid and thats cost price!

Jonzy , have you made this loom up so you can reposition the N249 outta sight ? So its still connected electrically and bypassed mechanically ?

 

[Sim]

Hi guys,

i removed n249 valve and the news connections are these:

is this right? the check valve directions is right?

if i make a check with vagcom always appears the n249 mechanical malfunction.

I added the 30ohm resistor (i'm an electronics technician..)

and sometimes appears n112 error, incorrect flux detect.

(with check valve turn right or left..)

any suggestion?

You should not get any fault codes at all. If you still get N249 mechanical malfunction and you hooked the DV up correctly then maybe your DV is faulty. As for the N112, did you leave the third nipple of the N112 open? It has to be opened (with the black cap on it).