Member Since: 04 Nov 2011
Location: Melbourne
Posts: 4
D4 EGR valves - can they be blanked off?
Hi all,
Does anyone know whether the EGR valves can be blanked off on a D4? And if so, where can I get it done and approximate cost? I'm in Melbourne and I have a TDV6 2.7.
The car is only 6 months old and i've noticed lots of black smoke since day 1. From what I have read (both on this forum and elsewhere) the smoke is largely because of the EGR system.
I've also read that blanking off the valves (on a 2.7 D3) helps get rid of the throttle hesitation on take off and helps with throttle response generally. Is this correct?
Any comments would be greatly appreciated.
Trent.
7th Feb 2012 9:41 am
caverD3
Member Since: 02 Jul 2006
Location: Oberon, NSW
Posts: 6922
D4 2.7 smokes more than the D3, probably due to different mapping. I would be getting the dealer to look at it as it is under warranty though.
Blanking in a Discovery after MY07 will bring up a fault code. NO solution yet but BAS are working on one I believe but you may have to wait longer for the D4.“There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely gamesâ€
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7th Feb 2012 11:13 pm
uktivo
Member Since: 13 Oct 2011
Location: Staffs
Posts: 139
I suspect they can still be blanked but you will get a fault light, is that correct?
The fault light doesn't trigger anything else like limp home mode etc. does it?Selling my wifes Audi A3 2.0LTR FSI DSG Sport to help pay for her D3
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7th Feb 2012 11:24 pm
disco4x4au
Member Since: 19 Jan 2006
Location: Perth
Posts: 409
uktivo wrote:
The fault light doesn't trigger anything else like limp home mode etc. does it?
It might - many "minor" faults have an associated event counter. A priority algorithm then decides whether to escalate the problem based (in part) on the number of event counts. Not sure if this applies to the EGR fault light.
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8th Feb 2012 1:37 am
caverD3
Member Since: 02 Jul 2006
Location: Oberon, NSW
Posts: 6922
Basically it may cause limp mode or reduced power after it has been ogged too many times.“There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely gamesâ€
Ernest Hemmingway
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8th Feb 2012 2:56 am
garrycol
Member Since: 06 Dec 2010
Location: Canberra
Posts: 1130
This thread on the RRS forum indicates that it might work on later 2.7s.
Member Since: 04 Nov 2011
Location: Melbourne
Posts: 4
Thanks all!
Seems I won't know if it will work or not until I try it.
Where can I source the blank off parts? Are they difficult to fit?
8th Feb 2012 10:06 am
kiwirich
Member Since: 02 Oct 2011
Location: Sydney
Posts: 99
I (think) I read that you can feed Bleed air from the sump breather to "fool" the Sensor that it's still measuring Exhaust Gas...........
Of course, now that I'm trying to find it, it seems to be invisible.
Anyone got more info ??
Kiwirich
9th Feb 2012 7:02 am
SHARKYSHARKS
Member Since: 20 Dec 2008
Location: Saddleworth Oldham
Posts: 1954
Mines having a new turbo and intercooler at the mo for the same reason as yours .... but mine is the 3 litre version, might be worth getting it checked out at the stealers before any mods are tried and while it is still in warranty MY18 D5 HSE LUX😎
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9th Feb 2012 7:55 pm
~Rich~
Member Since: 16 Mar 2009
Location: Sydney
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9th Feb 2012 10:08 pm
GraemeS
Member Since: 17 Mar 2008
Location: NSW
Posts: 706
kiwirich wrote:
I (think) I read that you can feed Bleed air from the sump breather to "fool" the Sensor that it's still measuring Exhaust Gas...........
The monitoring is a position feedback signal for the valve opening mechanism, not a gas sensor.Home of LLAMS, for LRs and Jeep GCs
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Basically it may cause limp mode or reduced power after it has been ogged too many times.
but mine is the 3 litre version, might be worth getting it checked out at the stealers before any mods are tried and while it is still in warranty 
