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Model specific boards => Golf mk4 => Topic started by: davemk4 on 08 March 2013, 11:00

Title: few qs after n249 by pass
Post by: davemk4 on 08 March 2013, 11:00

Just done the bypass this morning. Firstly no lumpy issues etc so good. No engine light. 

But it feels so different lol. Ive lost that big sort of kick i had. Boost gauge still peaks at 15psi tails off as should etc. But is this normal?

Also noise from the 007 different. Sound more like chatter sounds rather sweet. But again is this normal?

Title: Re: few qs after n249 by pass
Post by: GTi_James on 08 March 2013, 11:10

i thought any chatter or flutter wasnt a good thing?  :undecided:

Title: Re: few qs after n249 by pass
Post by: davemk4 on 08 March 2013, 12:00

This is it butvi rem a video on here on the 3" exhaust tgread. And his 007 sounded mint. And this defo changed sound

Title: Re: few qs after n249 by pass
Post by: coolio on 08 March 2013, 12:14

dont think it should change the sound of the DV , bypassing the n249 is for better throttle response ,are u sure u done it properly ?

Title: Re: few qs after n249 by pass
Post by: rio_gti on 08 March 2013, 12:58

Did you leave the one way valve on the vacuum pipe and if so it is round the right way??

Title: Re: few qs after n249 by pass
Post by: davemk4 on 08 March 2013, 13:03

I left valve on. The arrow on vakve said motor ← so i put valve into the arrow side

Title: Re: few qs after n249 by pass
Post by: Dalo Harkin on 08 March 2013, 13:34

did you chop any of the hard lines out or have you just bypassed the N249 (just checking as some people say bypass when they have actually deleted it)

I personally did the bypass and it didnt feel right at all, so did the delete

Title: Re: few qs after n249 by pass
Post by: davemk4 on 08 March 2013, 14:39

Exaxtly too the dot as walkthrough on here. T pieced fpr line to dump valve. And left wiring on vakve. All i have now is the 2 pipes on the other valve that it

Title: Re: few qs after n249 by pass
Post by: davemk4 on 08 March 2013, 16:21

Just double checked all same as walkthrough. Also both front fans run on when switch car on too.......

So im left with dv top pipe T pieced to the FPR line.
The n249 wired up but nothing else plumbed in.
The other valve 1 pipe goes to the 1 way valve in the motor← side then too inlet manifol
Other pipe goes to the small pipe down right side  engine/manifold

Just given it a big drive.

Plus point

Car boosts smooth to about 12-14psi
And has no spiking. And holds boost and slowly tails off  as should. Picks up and just seems better BUT

Fans are running non stop both of em
Dumo valve defo sounds different/louder maybe

Title: Re: few qs after n249 by pass
Post by: davemk4 on 08 March 2013, 18:05

Above post updated

Title: Re: few qs after n249 by pass
Post by: davemk4 on 09 March 2013, 10:26

Looking atvthis looks like fans are a different issue....

Title: Re: few qs after n249 by pass
Post by: Granta Gti on 09 March 2013, 13:59

Is your coolant temp. sender plugged in and all working?

Title: Re: few qs after n249 by pass
Post by: davemk4 on 09 March 2013, 17:15

Yes mate was one of the many new genuine part i replaced. Seen this thing about low speed resistors etc????? Mine does have climate control but air con is defo off