I chose not to blank on the wrong side of the EGRV, in warranty or not, it makes no engineering sense to put blanking plates on the outlet of the EGRV's
Removing the throttle butterfly on it's own helps with the pull-away 'dip' on a manual transmission vehicle, it does nothing to an auto-trans vehicle by virtue of the higher revs needed before the TC locks, just this mod on it's own will preserve the EGRV's - here's why:-
Blanked off EGRV's will allow exhaust gases to enter them up to the blanking plate, this in turn causes a swirl of exhaust gases, the EGRV's are 'cooled' to a certain extent. Unless Exhaust gases pass through the valves, some of these cooled gases will condense inside the valves chamber forming nitric acid. This in tirn will corrode the EGRV's spindle, seals and eventually work it's way through to the electrical components at the rear of the EGRV, causing the MIL to illuminate upon EGRV failure.
There are only two three ways to prevent this
1. leave the EGR system as it is and wait for the EGRV manufacturer to get it right
2. remove the throttle butterfly and let minimal exhause gases flow through the EGRV's thereby drying out the valves and reducing the potential for condensing gases eating away at the valve components
3. remove the throttle butterfly & blank off the EGRV's between the exhaust manifold and the valve, preventing any ingress into the EGRV at all
Maybe the case if you own a 2007 D3 with 2 good working EGRs. But what if your vehicle is 2005 with both causing problems? Then it does make engineering sense to blank them, unless you're happy to part with hundreds of £ to replace with yet more crappy valves that will last maybe 2 years? In pre 07 vehicles there is no MIL on EGR fail, so the only down side of blanking a failing/failed valve is the (negligible) environmental impact. Once it's started to go wrong, who cares what else corrodes inside it if it's blanked - it's fecked anyway. For the later vehicles where the MIL illuminates, as I said, more of a PIA. Maybe someone will one day come up with a device to tell the ECU not to light up the MIL on EGR fail, or even better, stop the engine from even trying to test / operate the EGRV at all.Previously:
2005 D3 2.7 TDV6 S
1984 90 2.25 Petrol CSW
1992 90 200TDi Hard Top
1995 Discovery ES 300TDi
2003 90 TD5 Truck Cab
29th Mar 2009 12:20 am
10forcash
Member Since: 09 Jun 2005
Location: Ubique
Posts: 16534
Pre-07MY vehicles do not illuminate the MIL in some failed EGRV circumstances but DO fall back to a reduced performance strategy, typically the indication is reduced fuel economy and a lower rate of turbo boost
Is there some sort of 'warranty envy' going on here?
Last edited by 10forcash on 29th Mar 2009 12:29 am. Edited 1 time in total
29th Mar 2009 12:27 am
bellautos
Member Since: 02 Feb 2006
Location: NorthYorkshire
Posts: 2532
Yes trawling in files looking for single bytes, and after all that its probabaly not worth it loool.
Pete
29th Mar 2009 12:28 am
bellautos
Member Since: 02 Feb 2006
Location: NorthYorkshire
Posts: 2532
The later ones are no problem either realy its just masses of time to replicate for all cars looking in the many different LR calibrations for things like
EGR_AIRV: factor for air mass flow through the engine
EGR_AIRV: factor to consider pressure ratio
and changing things like
Torque threshold for EGR disable (inj. state GES = 1)
AGE_EACT: delay time for EGR enable after start
Threshold for TQI-gradient for EGR-disable
while remembering to switch off the button for back up EGR strategy
Just to name a few.
Doing it is not hard, finding all the bytes in the file is very time consuming.
Pete
Last edited by bellautos on 29th Mar 2009 1:14 am. Edited 1 time in total
29th Mar 2009 12:42 am
nealgs
Member Since: 13 Jan 2008
Location: Leeds
Posts: 327
Hi Pete,
all that work reminds me of looking for infinite life pokes (hacks), all weapons etc in games on the old ZX spectrum/BBC Micro during the early 80's
looking through and watching binary files for a particular byte/bit to change etc - lol
keep up the good work
GaryGone: Java Black TDV6, Auto, HSE - yum, yum (Gone: 96' V8 ES Charleston Green, 96 V8 ES Black)
Toy: Southern Roadcraft Cobra, 383ci Chevy V8
Club - HiVis
Club - Disco3.co.uk Round Stickers
Club - Disco3.co.uk External Badge
29th Mar 2009 12:54 am
bellautos
Member Since: 02 Feb 2006
Location: NorthYorkshire
Posts: 2532
Youve got it i remember writing a few absoloutly crap games for the spectrum 48k, it was the bees nees of computers as you know when it first came out.
Its like watching the matrix film over and over lol
Is there some sort of 'warranty envy' going on here?
Errr, no! I'm simply highlighting the different way of thinking between someone who is under LR warranty (like you) and someone who is not (me). If I was in warranty I wouldn't insert blanks, a) because LR would replace a faulty valve FOC, and b) because the blank may invalidate any claim. Better still, the engine designer could use a more suitable and robust method of controlling NOx emissions.
But post warranty, on my particular vehicle, it makes more sense to spend a fiver on 2 bits of steel plate rather than £600 in 2 craply designed, limited life valves that feed junk into my inlet manifolds. Simple as that, and no-one has come up with a good enough reason to make me change my mind.Previously:
2005 D3 2.7 TDV6 S
1984 90 2.25 Petrol CSW
1992 90 200TDi Hard Top
1995 Discovery ES 300TDi
2003 90 TD5 Truck Cab
29th Mar 2009 1:42 am
The Coachman
Member Since: 22 Jun 2008
Location: West Midlands
Posts: 410
Well I have learnt alot from this post! My 2004 TDV6 broke down this morning - Land Rover Assistance came out and diagnosed a failed EGR valve (N/S). He did a temp repair and then we took it back to dealers. As I had a select warranty I thought great item covered. I was wrong (again) not covered by select and £300 to supply and fit new valve. Dealer kindly looked at it and tackled the warranty issue but no joy, EGR valve now on back order as there is none available. I read this and decided to blank it off and the dealer is going to do this for me. My question is can I expect it to perform ok with one EGR blanked off? I have no warning light etc as its an older car. Do I just wait for the other one to fail or blank that one off now as well? I cant justify spending another £300 on this car - its cost and lost a fortune in the year Ive owned it, my warranty, which has never covered a thing thats broken, runs out soon anyway so I wont affect that, and after that Im on my own. Any help is appreciated.
31st Mar 2009 5:43 pm
London Lad
Member Since: 27 May 2008
Location: Suffolk
Posts: 505
A bit O/T but a warranty not covering an EGR valve ??? Its an integral part of the engine for goodness sake, that's ridiculous..
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You should never argue with idiots because they will just drag you down to their level....then beat you with experience !
In your position Coachman, I would (and have) blank both sides. And if the valve has failed there's no reason (IMHO) to go to the extra effort of trying to blank the input to the valve, rather than the output (which is much easier to get to). You need to take out the butterfly valve as well though.Previously:
2005 D3 2.7 TDV6 S
1984 90 2.25 Petrol CSW
1992 90 200TDi Hard Top
1995 Discovery ES 300TDi
2003 90 TD5 Truck Cab
31st Mar 2009 6:18 pm
The Coachman
Member Since: 22 Jun 2008
Location: West Midlands
Posts: 410
Warranty not covering it! Dont even go there. A WARNING to anyone who is fobbed off with a Land Rover Select Warranty on a 60,000 mile plus vehicle IT COVERS ABSOLUTLY NOTHING and further more ITS NOT EVEN WORTH THE POSTAGE STAMP THEY SEND IT YOU WITH
I know but here is my last 9 months list of failed (and not covered) items;
Diff failed not covered
CD player failed not covered
Both ball joints failed not covered
EPB failed not covered
Oil leak not covered
EGR valve not covered
Dodgy door lock not covered
In all the failed items Ive yet to have a succesful claim against my select warranty and ive tried several dealers as well to get things sorted.
31st Mar 2009 6:23 pm
London Lad
Member Since: 27 May 2008
Location: Suffolk
Posts: 505
Blimey! What does it cover ?.
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You should never argue with idiots because they will just drag you down to their level....then beat you with experience !
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
I know but here is my last 9 months list of failed (and not covered) items;
