The correct way to do an N249 bypass the full guide

[mc funbot]

Thanks pal glad it worked well for you.. I sat and worked it out late 1 night with my dad to may guides of just half a job..its never failed me and ive done countless of these bypasses. Thanks for the awesome feedback

 

[Charlie20v]

I did this today, went out for test drive and the traction control light came on (no EML) so plugged vag com in and got a load of faults!! I've cleared them but they keep coming back. what did I do wrong? any ideas?

Address 01: Engine Labels: 06A-906-032-AJQ.lbl
Part No: 06A 906 032 MJ
Component: 1.8L R4/5VT 0003
Coding: 11510
Shop #: WSC 00000
VCID: 72E1999B3E88EC8826F
VSSZZZ1MZ4R060166 SEZ7Z0C2259648

8 Faults Found:
17833 - EVAP Purge Valve (N80)
P1425 - 35-00 - Short to Ground
17525 - Oxygen (Lambda) Sensor Heating Circuit: B1 S2
P1117 - 35-00 - Short to Ground
17843 - Secondary Air Pump Relay (J299)
P1435 - 35-00 - Short to Ground
17829 - Secondary Air Injection Solenoid Valve (N112)
P1421 - 35-00 - Short to Ground
16486 - Mass Air Flow Sensor (G70)
P0102 - 35-00 - Signal too Low
17523 - Oxygen (Lambda) Sensor Heating: B1 S1
P1115 - 35-00 - Short to Ground
17522 - Oxygen (Lambda) Sensor; B1 S2
P1114 - 35-00 - Internal Resistance too High
17511 - Oxygen (Lambda) Sensor Heating; B1 S1
P1103 - 35-00 - Performance too Low
Readiness: 0110 1101

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 1C0-907-37x-ASR.lbl
Part No: 1C0 907 379 K
Component: ASR FRONT MK60 0103
Coding: 0022017
Shop #: WSC 00001 001 00001
VCID: 3261599BAE08AC88E6F

1 Fault Found:
01314 - Engine Control Module
013 - Check DTC Memory

I'll go and get some photos so you can see what I've done

 

[Charlie20v]

I can't put pictures up as I need 15 posts. The only thing I did differently was instead of run a new vac line from the top of the DV to the inlet I left the original pipe and ran a pipe from under inlet to metal pipe. so basically the same unless that metal pipe runs anywhere else?

 

[mc funbot]

If you can get some pics or email them to me [email protected] those faults are are exhaust lambda after the cat.. the other yiu may have a split in your sai pump n80 is your evap canister the n112 could be that you have not taken a pipe of it you need to??

 

[Charlie20v]

Sorted it!! I somehow blew a fuse when unplugging stuff. For future reference it was fuse no.43 (red 10 amp) if the same should happen to anyone else.

Thanks for the guide

 

[daz_rt_04]

Hmm done this to my standard BAM'd LCR and reversed it shortly after.

Flutter noise galore and tbh I didn't really notice any difference, perhaps less low down punch if anything.

 

[mc funbot]

Do you have pic.mainly its done to stop boost leaks. The LCR is a little different on set up am I right?

 

[BoostHard]

Do you have pic.mainly its done to stop boost leaks. The LCR is a little different on set up am I right?

It's not that much different, As long as you take the Vac pipe off the manifold straight to the DV it should be fine shouldn't it?

 

[mc funbot]

As long as everything else is removed or blocked or you get problems

 

[Sprogpole]

Before I go cutting pipes and ripping them all out, could I cut the one vac line to the SAI valve and block it as per your guide, take the pipe from all the crap to mani off and block it, then run DV straight to mani?

I'm thinking that it will achieve the same end result without taking too much off, If it starts putting the EML on, I can put it back to standard easy?

Thoughts please

 

[534N]

I have just done this and have a couple of questions

Firstly is it likely that I cracked the dipstik pipe putting it back together?

And is it right that I dont get the dv tishhh. Now all I get is the wg chatter?

 

[mc funbot]

You go get a different dv noise depends on that make and model you have ans mods etc. Dipstick tube you have to be careful with they get brittle

 

[534N]

Yea I think I broke mine wah

 

[534N]

A week after doing the engine managment light has started coming on not affecting the drive but on none the less the first time I ordered a reader/clearer and after a few days of driving with the light on I recieved it and cleared the fault then a few days later it came back on and I read the codes one isnt listed in my book and the other said s,a,i wrong direction so I cleared them then a few days later its come back on saying 3 faults with I haven't yet read but I have noted them down and cleared them today. Any ideas or just ignore them and keep clearing them

 

[Adjay]

Your resistors are not working or are the wrong values.

 

[534N]

What resistors??

 

[mandipvirdi]

Hi mc_funbot,

I did this n249 bypass on my leon cupra and to be honest was very easy and worked a dream, however now my car is throwing up the p0411 fault code which is for the sai.

Why is it doing that? have i done something wrong? As when i start up in the morning from cold it sounds like a vacuum and is really annoying!!

 

[DannyJigg]

I've had this in place for about 6 weeks now and it's so much better than standard. My only gripe is that I occasionally get the EML show up due to SAI incorrect flow. I've got an idea for a workaround, but want to test it first before posting it up. I could always perform a SAI delete and get it mapped out - but that would require funds...

 

[nathan_20vt]

Hi mc_funbot,

I did this n249 bypass on my leon cupra and to be honest was very easy and worked a dream, however now my car is throwing up the p0411 fault code which is for the sai.

Why is it doing that? have i done something wrong? As when i start up in the morning from cold it sounds like a vacuum and is really annoying!!

Snap!

 

[mc funbot]

Hi mc_funbot,

I did this n249 bypass on my leon cupra and to be honest was very easy and worked a dream, however now my car is throwing up the p0411 fault code which is for the sai.

Why is it doing that? have i done something wrong? As when i start up in the morning from cold it sounds like a vacuum and is really annoying!!

That hoover sounding thing is your sai pump they run 60-90 secs then shut of its to warm your cat up. This has never affected any I have done. Some times the pump being loud is normaly due to the pump cracking. You could always unplug the pump an see how it goes... everything is taken of the n249-n112 no loose lines. You blocked of the bottom line? Hope this helps