possible vRS DV problems

drm_jones · 10-07-2005, 13:15

Guys,

What are the symptoms of a failing DV?

When driving my vRS in low gears (most noticable in 1st or 2nd at around 2-3k rpm under part load) the car occasionally jerks and lurches like boost pressure is being dumped and then re-applied. Is this indicative of a failing DV or N75 valve?

Cheers

**GAFF** · 10-07-2005, 13:33

Quote:

Originally Posted by drm_jones

Guys,

What are the symptoms of a failing DV?

When driving my vRS in low gears (most noticable in 1st or 2nd at around 2-3k rpm under part load) the car occasionally jerks and lurches like boost pressure is being dumped and then re-applied. Is this indicative of a failing DV or N75 valve?

Cheers

I had a failing DV, mainly noticable when cold. Do a search for 17705 and it'll throw loads of info up

. Any fault codes showing up ?

drm_jones · 10-07-2005, 14:15

Quote:

Originally Posted by GAFF

I had a failing DV, mainly noticable when cold. Do a search for 17705 and it'll throw loads of info up

. Any fault codes showing up ?

Do fault codes trigger any warning lights on the dashboard or do I need to interrogate the ECU with VAG-COM?

Currently no warning lights are showing.

WW_VRS · 10-07-2005, 14:23

Vag-com

**GAFF** · 10-07-2005, 15:58

In the 3 years I had the fault on my car (35k) the engine light only came on 2 or 3 times, even though the fault was on the car nearly the whole time.

Other people have had the same fault code as me ie 17705 with different fixes.

See http://www.briskoda.net/forums/showt...ighlight=17705

But that hesitation was quite noticable in mine when cold.

Toonarmy vRS · 10-07-2005, 22:04

i've just took the DV off my oct vRS for exactly the same reason. It was a DVK007 atmos dump valve. They don't work properly because of the mass air flow sensor. If the valve you had on had a blank plug for the air box pipe then that's ya problem. You need it replaced with a Bailey DV30. Same effect but it's a recurculating DV so your air flow sensor'll work properly.

drm_jones · 11-07-2005, 00:09

Quote:

Originally Posted by Toonarmy vRS

i've just took the DV off my oct vRS for exactly the same reason. It was a DVK007 atmos dump valve. They don't work properly because of the mass air flow sensor. If the valve you had on had a blank plug for the air box pipe then that's ya problem. You need it replaced with a Bailey DV30. Same effect but it's a recurculating DV so your air flow sensor'll work properly.

I'm still using the stock (re-circulating) DV.

I took the car out for a drive today but could not replicate the hesitation - should I be pleased that it is running well or annoyed that it decided not to play ball

I guess that I need to find someone who is equipped with VAG-COM near Bristol.

Lummox · 11-07-2005, 00:12

Pop the little vacuum hose off the top, connect up a length of hose (washer tube maybe) and give it a gentle suck, if you can keep sucking its knackered.

drm_jones · 11-07-2005, 00:16

Quote:

Originally Posted by Lummox

Pop the little vacuum hose off the top, connect up a length of hose (washer tube maybe) and give it a gentle suck, if you can keep sucking its knackered.

Will give that a go.

Cheers Lummox

10-07-2005, 13:15	#1
drm_jones Worthless loser Join Date: Jan 2005 Location: Nowhere of interest to anybody Posts: 1,034 Thanks: 0 Thanked 0 Times in 0 Posts	possible vRS DV problems Guys, What are the symptoms of a failing DV? When driving my vRS in low gears (most noticable in 1st or 2nd at around 2-3k rpm under part load) the car occasionally jerks and lurches like boost pressure is being dumped and then re-applied. Is this indicative of a failing DV or N75 valve? Cheers __________________ David 2002 Black Magic Octavia V/RS

10-07-2005, 14:23	#4
WW_VRS Escorted Estate Join Date: Nov 2004 Location: Oxfordshire/Berkshire Posts: 9,736 Thanks: 44 Thanked 70 Times in 61 Posts	Vag-com __________________ WW --->> Project Journal (pic links in first post there) Lummox'/Ross thread on Unit18 Automotive progress on my car: here

10-07-2005, 15:58	#5
GAFF Briskodian Join Date: Oct 2002 Location: Dublin, Ireland Posts: 5,770 Thanks: 25 Thanked 65 Times in 63 Posts	In the 3 years I had the fault on my car (35k) the engine light only came on 2 or 3 times, even though the fault was on the car nearly the whole time. Other people have had the same fault code as me ie 17705 with different fixes. See http://www.briskoda.net/forums/showt...ighlight=17705 But that hesitation was quite noticable in mine when cold. __________________ GAFF Briskoda Ireland Events, Meets & Pictures.....Race Blue Octavia MkII vRS.....Old Octavia MkI vRS

11-07-2005, 00:12	#8
Lummox U18 Automotive Join Date: Sep 2003 Location: Newport Pagnell Posts: 21,805 Thanks: 22 Thanked 658 Times in 554 Posts	Pop the little vacuum hose off the top, connect up a length of hose (washer tube maybe) and give it a gentle suck, if you can keep sucking its knackered. __________________ Unit 18 Automotive Services now open Servicing, repairs, modifications you name it we do it. Cupra console bushes at special price, PM for a very competitive quote.

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10-07-2005, 22:04	#6
Toonarmy vRS Briskodian Join Date: May 2005 Location: North East England Posts: 30 Thanks: 0 Thanked 0 Times in 0 Posts	i've just took the DV off my oct vRS for exactly the same reason. It was a DVK007 atmos dump valve. They don't work properly because of the mass air flow sensor. If the valve you had on had a blank plug for the air box pipe then that's ya problem. You need it replaced with a Bailey DV30. Same effect but it's a recurculating DV so your air flow sensor'll work properly.