HOW TO BYPASS THE N249 FOR VW JETTA GTI 1.8T

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by doing this upgrade you are going to solve a huge problem if you are experiencing lost of boost between gears it might be the n249
i had the problem that when i hit the gas the car will boost 10 psi but when i change gear the car will loose all boost lets say form 4 gear it will boost great but putting 5 gear it will loose all the boost and that's because the n249 gets stuck in the open position so once i bypass the n249 and put a direct vacuum line the car start to boost again in all gears so to me it was really worth spending time doing this hope you like the video and you can subscribe for more videos every week

[@fockyoumang]

just did this this in ten minutes, I have about 30 feet of extra vacuum line from my brother's Saab 9 5 Aero High Output 2.3L Turbo. It's so easy, anyone, unless they were maimed can do this. In ten minutes

[@andrewgerling3834]

Man I wish some jack as* didn't do this to my car before I bought it now I have to watch you so I know it's done right thanks for the vid

[@squalo777videos]

im glad the video helped! instead of investing time and money in a mechanic shop i invested money in tools

[@yuzlemhusnu9778]

I had a plan till I watched this ...just confused the fuck out of me

[@deadghoststudios]

Just got a gti mkv. I recently pulled a p0413. Secondary air injection system switching valve "A" circuit open. From what I've read online this is the n112. Car seems fine. Is this something i need to worry about? From the video I'd imagine the vacuum is pretty much going straight to the n249? Great video btw! Thank you. This has been the only source for me to find this valve. Till i get a haynes manuel :)

[@ronnydee34]

What about those 2 hoses under the intake that you said you don't need anymore? Should they be capped off???

[@OG_DSM]

@squalo777 does this also apply to b6a4 with amb engine code? I lose boost under acceleration but when I let off it builds up..? I know it sounds strange and it's a little hard to explain but eventually boost does buildup and I lose boost between gears

[@hussey932]

Thanks for the video very helpful top man

[@squalo777videos]

Kirk k no problem bro glad you like the video if you have any problems with your 1.8t just let me know i know this engines really good

[@hussey932]

Thanks a lot bro more than likely I'll be asking you a few questions lol

[@squalo777videos]

Kirk k any time bro if you want you can check my other videos im trying to upload everything i know about this cars

[@michelongorockero]

Heyyy bro a question to enhance the bypass the emptiness of the blow-off is lost but i see in the video that you get the void of another valve i could tell where and where they connected the hoses that my blow-off lost the void as I`m commenting and does not work well

[@bucketoftruthify]

I'm doing this temporarily and maybe put n249 back in service in future. I'm not going to tap into the FPR vacuum though, I'm just going to use the one VW used to supply vacuum to BOV/n249/etc. In this vid, aqualo had already installed the aftermarket BOV and tied into FPR for vacuum. Looks like good installl though. Personally, I would change it so fpr vacuum is dedicated to just fpr.

[@obewonknobee]

what is vacum line coming from your fpr going to? i have fuel issues or at least i think i am, broke the connector to my n112 valve (what ever controls the sai pump) i just connected my fpr line directly to the intake w/o the one way valve. now my car goes into limp mode intermittently, would i need to connect the one way valve to my fpr? or will be a coilpack issue?

[@travislettau1596]

Awesome videos for the most part man...only thing is you talk a little on the quiet side...maybe it's just because I'm watching videos on my phone though. I think you got my sold on the Forge 008 DV though! Your Jetta sounds great! I have not heard of this upgrade though...all you need to bypass it are some hoses and connectors though?

[@squalo777videos]

The only thing you need is hoses and clamps that's pretty much it thanks for you comment bro I will try to do them better and is a really good upgrade your valve is going to sound better and is going to hold boost better

[@viruskayz]

some say it's optional to put hoses on the resistor? some say it's better .. what you think ?

[@alejandrodibenedetto66]

The N249 with no signal from the ECU communicates the manifold vacumm to the DV, and when the N249 receives signal from the ECU it communicates the reservoir of vacumm to the DV. Therefore the presence of the N249 I consider is necessary to have a better reaction in the engine to be able to activate the DV even when there is still boost in the manifold, therefore the overpressure does not force the opening of the N75 and the turbo does not fall from Rpm giving better reaction. As a conclusion I think removing the N249 engine would have less reaction and unnecessary wear on the turbo The only thing I see as positive when removing the n249 is less vacuum lines, better appearance

[@gotwebsite1]

Can you tell me how many watts the 4.3 v diode should be , 1 watt or 5 watts or?

[@portu210]

Today I made a that bypass to my Jetta and I get turbo flutter. 🤔 is that good or bad? I’m running stock dv

[@oscarceja8740]

ok thanks bro, awesome vídeo

[@squalo777videos]

+Oscar Ceja thanks bro hope the video was helpful

[@misraingonzalez8483]

hey i did the bypass on mine and the only thing i didnt kinda under stand was that on the b.o.v the hoses that come out were they go i seen one going under the manifold cuz you put T on them

[@squalo777videos]

Ronny D theres no need to do anything with those hoses those are the ones comming from the n249 you no longer need them no air goes through those hoses

[@johnwilliams1753]

I got a boost gadge to fpr do i get a 4 way splitter and what about that pipe by the dv nothing going to it thats were the box taps in to

[@oscarceja8740]

hey squalo what's up paisa, i just have a question, what do you do whit the hose that goes to the waste gate? i mean were do you plug it after? or do u even touch it ?

[@squalo777videos]

+Oscar Ceja no the ones that goes to the wastegate comes from the n75 you dont have to do anything to do hose

[@milenshumanov183]

Hi man i did the same thing like you do and now i have a error code 17608 - Boost pressure control valve (N249) Mechanical malfunction. Why this hapened? I put the valve conected to the electrical system. I folow the same steps like you, am I missing something?

[@VF28WWE]

where did you get those blue hoses?

[@ishmaelmcadoo47]

Where did you buy your hoses from bro ???

[@fockyoumang]

it was a bad coil pack sending the car into limp mode until I restarted the engine. I just got all new spark plugs, just the stock ngk double or triple platinum, the stock ones, and the red Audi 06e coil packs. I didn't have enough to get the adapter plate but they sell overhead bolt on adapters for cheaper.

[@fockyoumang]

What to you set the gap to do it runs leaner without detonation? Did you regap your plugs?

[@squalo777videos]

😁😁I'm glad you fixed your car bro

[@squalo777videos]

I gap them to. 040 the first time it runs fine and idles really good but I put them back to. 032

[@fockyoumang]

+squalo777 videos I was compression testing the engine and realized the 1 coil was misfiring, not severe where it was running idling like crap BUT under load, I don't think it's going to be finished this week but I always expect the worst for dinner reason

[@fockyoumang]

+squalo777 videos thanks

[@steambuns2283]

hello just wondering what's the other hose on the right on the 3 way hose adapter? thankyou

[@steambuns2283]

i might to this one thankyou

[@WarHawk427]

Do not do this, the n249 is controlled by the ecu and can close the diverter valve in cases where it would be normally open, therefore the ecu can create boost in part throttle situations. LET THE ECU do what's best for the engine! It's there for a reason!

[@squalo777videos]

I totally disagree!!! If you take a moment to read your comments you saying that the ecu can close the diverted valve when it's normally open witch is bad for your Turbo and I believe that if the ecu can close it when is open and can also leave it open when it suppose to be close right? If what your saying it's right !!!then the n249 bypass would be a good upgrade, cause you no longer need the ecu, or the valve to open or close your diverter valve, when the n249 fails and fails miserably!!! Leaving the valve open and sending all the boost that the Turbo is creading back to the intake, with the n249 bypass you don't have to worry about that it's a direct vacuum line going to the diverter valve, do a little bit more research you'll see it's worth doing it

[@takedwon98]

you think the engine can creat boost by itself by closing the dv??? the dv doesnt build boost.. it simply bypasses boost when you let off the throttle. the n249 valve is a slow reacting valve and when it works it does its job but when it fails its bad and for me it gave me massive turbo fludder.. yes the evc does whats it programed todo but when you have more boost or change the motor at all and the ecu is still running stock it doesnt know what is better for th engine

[@og_tokyo]

lol@warhawk

[@jmedrano8854]

WarHawk427 since when did the ECU control the diverted valve?

[@jutjub22]

That is true, but what about letting off the throttle situations. N249 can react faster than the intake. So n249 can let off the boost quicker while intake is still under boost, which is better for the turbo? How much does n249 delete put strain on turbo is the question.

[@aliveagainstmywill9143]

Not sure what you're doing with your secondary vaccume systems and I'm also not sure you're aware that "black box" is the n249

[@hussey932]

What modifications have you done so far bro how much bhp do you have at the moment I've got a VRS 1.8 turbo 180bhp I have fitted a front mount intercooler a Forge splitter r dv and a boost gauge and a oil catch can I will try and put a video up of it tomorrow depending on the weather over here lol

[@squalo777videos]

Kirk k ok i have the 3" full exhaust system front mount inter cooler forge 008 valve the vr6 maf housing n75j k04 turbo i still have to put the injectors and the chip is a 05 jetta gli it came with 180 stock im not sure howmuch power it has rightnow im waiting for the unitronic stage 2+ i would like to see your car it be cool if you upload that video

[@hussey932]

squalo777 videos that sounds nice man I need to do half of that stuff 2 my one when having the money lol. I must admit I do like the Jetta's And that colour really does suit it nice car bro and I will definitely put a video up tomorrow

[@squalo777videos]

Kirk k thanks bro and the upgrades i did them little by little i still have to do the chip im going to try to dyno the car as it is right now and after i put the chip,

[@hussey932]

squalo777 videos I have stuck a quick little video up I will try and put some more up soon bro

[@squalo777videos]

Kirk k man I wish I have the right side drive it just look good bro what part of the planet you from bro lol ? I like your cat bro I like the way it looks from the front nicee!!

[@b_rai_0854]

so by bypassing my n249 what will I gain? better boost curve? more boost? ..

[@squalo777videos]

OK by doing the n249 bypass you'll be able to hold boost better this upgrade is for the diverter valve or blow off valve the n249 open and close the dv valve and most of the times it stays open and that's how you loose boost if you do the n249 you putting a straight vacuum line for the diverter valve in short words this makes the diverter valve to operate much better

[@silver40s14]

nice and sloww.....yank!!!! snap

[@fockyoumang]

what it's that black valve/diaphragm looking plastic piece that goes goes into the hose coming out the intake manifold? Can I use a T? What is the off that and where can I get it? Is it from a different part of the engine? Thanks

[@squalo777videos]

Check out this item I found on eBay: pages.ebay.com/motors/link/?nav=item.view&id=281853483074&alt=web

[@squalo777videos]

Is that the one you talking about?

[@fockyoumang]

+squalo777 videos I can't view it, the link takes me to Google play butt I already have the app installed. I'll find it through the listing number. There's the one hose coming off the bottom of the intake that connects to that black ball thing and then the other hose goes to the front side where the valve is she it works plug in. I'll take a screen shot and post it on Microsoft One Drive, I'm out of space on Google drive. I think One Drive odd unlimited because I have a Microsoft account through xbox live

[@fockyoumang]

+squalo777 videos 4:10, pause and the piece the two hoses connect to. I already did everything

[@squalo777videos]

That one it's call a one way valve just type in vacuum check one 1 valve for Jetta 1.8t

[@rinisugiarto844]

May i ask a question is by pass n249 gives a better accleration???

[@squalo777videos]

Rini Sugiarto ok the n249 is the one responsible to open and close your bov or diverter yes it give you better throttle response cause your not depending from the n249 to close or open, by putting a direct vacuum line you dont have to worry about leaking air because the n249 didn't close fast enough its a great upgrade and it really really work better than the n249 i have had this upgrade for a year now with no check engine light everything works good and my car hold's boost really good, go to vortex.com you can see a lot of reviews of the n249 upgrade but ether way its a great upgrade

[@rinisugiarto844]

thank I by pass n249 for a week and see if it makes a differences in performance and fuel. Thanks again.

[@squalo777videos]

Rini Sugiarto you welcome remember to subscribe for more videos every week

[@fockyoumang]

What size hoses? I'm buying all the parts right now?

[@fockyoumang]

Are they 3/16 hoses?

[@squalo777videos]

Yes I really think is a 3/16 that's pretty much all you need

[@squalo777videos]

Yes

[@mrmumrik8722]

so cappuccino Thatcher ny Old 1.8t dont have all those valves and hoses.. agu ftw

[@b_rai_0854]

hey man I just did this upgrade axactly as you explained and I lost a bunch of boost and can even hear my box open what's wrong? I have a mbc

[@squalo777videos]

I'm sorry to hear that bro the porpuse. of the n249 upgrade is to have a direct vacuum line for the diverter valve if your boost was normal before this upgrade check all hoses for a boost leak I have had this upgrade for .a year now I did it cause.I was having problems with the n249 getting stuck open all the time and I was loosing pretty much all the boost thats why I bypass my n249 the diverter valve just needs a vacuum line to open and close the n249 is responsible for opening and closing the diverter valve this is just between the diverter valve and the n249 the only way you can be loosing boost is if your diverter valve or blow off valve is stuck open and is bleeding all the boost back in to the intake check all your Hoses for leaks and most important check your diverter valve I really hope this was helpful and I hope you solve the problem with your car good luck bro

[@squalo777videos]

I'm sorry to hear that bro the porpuse. of the n249 upgrade is to have a direct vacuum line for the diverter valve if your boost was normal before this upgrade check all hoses for a boost leak I have had this upgrade for .a year now I did it cause.I was having problems with the n249 getting stuck open all the time and I was loosing pretty much all the boost thats why I bypass my n249 the diverter valve just needs a vacuum line to open and close the n249 is responsible for opening and closing the diverter valve this is just between the diverter valve and the n249 the only way you can be loosing boost is if your diverter valve or blow off valve is stuck open and is bleeding all the boost back in to the intake check all your Hoses for leaks and most important check your diverter valve I really hope this was helpful and I hope you solve the problem with your car good luck bro

[@b_rai_0854]

+squalo777 videos yea I ended up reversing the n249 bypass ...which was a bitch btw you know how many connections there us back there. ..anyway come to find out it was my N75 ..so I unplugged it and ran my mbc solo... my boost spikes up to 15 at the highest and. down to hold at 8. psi in every gear . what could it be ? I've checked all hoses no leaks ... im running stock ecu on 01 jetta ...it's only suppose to run 8psi stock

[@b_rai_0854]

+B_RAI_08 do you think it's my map sensor telling my ecu to cut down boost? .. should I do diode mod? ... also I tried unplugging my wastegate actuator and I still loose all boost down to 8 after spiking to 15.

[@squalo777videos]

if you have a stock ecu you should be spiking at least 13 psi and holding 8 psi your are not loosing boost bro is pretty normal you always going to have a spike of 13 to 15 and hold 8 with a stock ecu believe me bro it's normal if you wanna be able to hold more boost do your ecu upgrade right now your engine is very healthy except for the part when said you unplugged your n75 in most cases when you unplugged you'll only boost 5 psi so remember to keep your n75 plugged

[@chunkbrownstain5792]

but you lose mid throttle NA mode and under low boost it bogs tried it years ago not happy with the results, just like 90% of the vortex

[@markliz3604]

what about all the other lines that are open?

[@squalo777videos]

You no longer need them there's no air coming out of those hoses

[@freeworld7724]

The end is confusing.. u go from diverter valve where to???

[@LetsPlayDaPc]

i did this exact thing in the end my dv no longer works

[@jmccann6735]

LetsPlayDaPc Stock DV sucks ass and is super weak, can barely hold any more than stock boost. My 1.8t is equipped stock with the 710C diverter valve, and I just used an MBC to bump up my boost to 11 psi. Almost immediately after I started hearing the diverter valve diaphragm humming and being under a ton of pressure it isn't built for. I'd recommend the 710N for a DV upgrade, it's the stock Audi TT DV and is strong enough to handle about 18 psi, while being a good, cheap OEM component.

[@SquillyMon]

May I ask WHY you are doing this ?

[@gregh7457]

who is asking? are you law enforcement? i don't know anything.

[@SquillyMon]

greg h LOL...No.... Just curious why you don't just flash the programmable ECU that runs your engine and manages the Turbo...There's more power to be had by doing that, and it is the correct method...this way is silly

[@gregh7457]

cost i would imagine. much cheaper to ghetto rig than reflash. how much to reflash? 200 bucks?

[@kenpeters5488]

check out my video i just uploaded. just did the mod on my 04 jetta gls

[@squalo777videos]

Thanks for the shout out!!!! That video made my day

[@DJROBONE1]

HEY BY ANY CHANCE U HV A VIDEO HOW TO DO ALL THE BLUE VACUM LINES? # V-DUB FREAK....

[@squalo777videos]

+DJROBONE1 i do not have a video but you just gave me an idea bro thanks!!! V-DUB FREAK

[@DJROBONE1]

Lol ur going to do a video on it?

[@DJROBONE1]

I'm having lil problem with mines plus I lose alot of boost and it backfires..

[@jonmurphy7037]

@@DJROBONE1 did you find out why you were losing boost and backfiring? My car is chipped and used to hold 19psi, now it only holds 14psi and backfires at high rpms