Rob B
Member
Registered: 8th Jan 04
Location: Area Motorsport Drives: Race EP3
User status: Offline
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Hey guys, tonight i noticed a bit of a problem, when my boost spikes above 20 psi it seems i get a kind of missing sort of noise, then it goes into limp mode for a few seconds then it will let me fully boost again...
Best shown and heard in the video here
http://www.youtube.com/watch?v=i4O5m1sYwOc
THis is the car straight after doing 40 - 120 without it doing it, not fully pushing it and 3 up aswell.
http://www.youtube.com/watch?v=uy__s5TZHgQ
More detailed description>
when at say 2k revs in 4th, put foot down its fine until it gets past 20 psi then it will make a sorta of brrrr brrr noise, then go into limp mode for a few seconds.
However if im in 4th and boot it when its at 3.5k rpm so it doesnt have to spike as much its find and doesnt make the brr brr noise at all.
Mods are full stage 2, n75 race valve, n249 bypass done aswell, oil and filter change about 5 k ago, plugs about 9k ago, forge front mount, split R, TIP, full blue flame, new Maf about 2 months ago, no warning light coming on either.
Any help is appriciated.
Rob
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Rob B
Member
Registered: 8th Jan 04
Location: Area Motorsport Drives: Race EP3
User status: Offline
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Oh and its the airbag light and TCS light thats illuminated, NO EML etc is coming on, and i have no access to vag-com
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jr
Member
Registered: 20th May 02
Location: Kent
User status: Offline
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Could be one on the pressure pipes that go from the cut off/N249 valve to the turbo diagram, they get fucked up due to heat, and could cause that mate
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Jas
Member
Registered: 13th Oct 04
Location: Mid Wales
User status: Offline
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do you have a laptop rob? if so i can send you my vagcom via post if you're willing to send it back after you've used it etc
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Rob B
Member
Registered: 8th Jan 04
Location: Area Motorsport Drives: Race EP3
User status: Offline
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If you could Jas that would be great  , need to do some logs really..
JR, ive bypassed the N249 valve cause of that exact problem i beleive it was, and all the pipes have been replaced with blue hard silicone ones
[Edited on 04-01-2008 by Rob B]
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