N249 Bypass

[kevinking2020]

Hi

I had ago of trying the N249 bypass and was wondering if i've done it right?

Still using the standard dump valve for the being and the dump valve is louder and a different tone but it has helped.

Cheers

 

[jam666999]

Looks good to me

 

[Mo Arif]

yup thats the bypass

 

[jamielee]

dont you need to put a resister in somewere though???i been reading different post and some say you need a resister and others dont.help me!! confused

 

[jam666999]

You put a resistor if you do a complete removal, the the resistor goes across the plug to trick the ecu into thinking it's all still there. This goes for the N249, N112 & SAI

 

[Pyro]

You put a resistor if you do a complete removal, the the resistor goes across the plug to trick the ecu into thinking it's all still there. This goes for the N249, N112 & SAI

Retty sure you only need the resistor on the lcr tho not lc an the op's engine is lc

 

[jam666999]

Oh I thought it was on all the 1.8t engines, I used to have a mk3 Ibiza cupra and had to use them on that.

 

[Mo Arif]

Correct for removal you need resister, for bypass you dont

 

[jezsidewalk]

dont suppose anybody has a guide for how to do this on an 1.8t fr engine???

or could do a sort of detailed-ish guide??? thanks!

 

[carew]

What effect does a n249 bypass have?

 

[8bit]

dont suppose anybody has a guide for how to do this on an 1.8t fr engine???

or could do a sort of detailed-ish guide??? thanks!

Amazing what you can find if you try the search function - http://www.seatcupra.net/forums/showthread.php?t=215866

What effect does a n249 bypass have?

Haven't done it myself yet but apparently the car holds boost better. Beware though, one or two folk have found it causes problems with their cars.

 

[Pyro]

Correct for removal you need resister, for bypass you dont

You sure the LC needs it? I don't think mines got the resistor?? And it's completely removed I don't get s code for it the bypass allows you to contol the dump and has proven to give a smoother boost curve

 

[jamielee]

i now see,that makes more sense.my LC now holds better boost and does just seem nicer to drive to be honest

 

[Ape]

I removed the whole lot on my LCR this weekend. I get a P17695 code (I think) which is "Boost Pressue [something something] malfunction" which is the N249. I used to get the P17608 code which was the same but "Open Circuit" after doing the bypass but leaving the N249 solenoid in. Doesn't bring up the EML or have any bad effect

 

[Daveyseat]

Hi

I had ago of trying the N249 bypass and was wondering if i've done it right?

Still using the standard dump valve for the being and the dump valve is louder and a different tone but it has helped.

Cheers

Where's the other piece of hose going for the bypass? What's it conect to the hose nearest to the bumper
I'm trying to do the bypass now