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Old 23-05-2016   #556
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Re: Volkswagen emissions scandal

My 2.0 tdi euro 6 is not part of the scandal so not subject to any recall or work but manages to meet emotions targets without adblue, it seems to be mostly bigger cars which need it
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Old 24-05-2016   #557
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Re: Volkswagen emissions scandal

Quote Originally Posted by gadge View Post
F**kin stuff I spilt some on my trousers and right boot the other day
Yep its not nice stuff but the big truck makers love it, even Scania have come back to it after moving away on the smaller HGV trucks as the engines are horrible to drive.
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Old 30-07-2016   #558
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Re: Volkswagen emissions scandal

Crikey

link to story with us information

Coming soon even more attractive leasing rates on the same unattractive cars..
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Old 30-07-2016   #559
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Re: Volkswagen emissions scandal

Quote Originally Posted by StevenRB45 View Post
Crikey

link to story with us information

Coming soon even more attractive leasing rates on the same unattractive cars..
and their "good friends" below the 38th parallel are well in on the act..
http://www.wsj.com/articles/volkswag...ase-1468379701

I heard it's @60% of their VAG imports will be returned.
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Old 09-04-2017   #560
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Re: Volkswagen emissions scandal

Well they did try and fix it....

*sad trombone*

https://www.hypermiler.co.uk/dieselg...-emissions-fix
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Old 12-07-2017   #561
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Re: Volkswagen emissions scandal

Well this is back in the news again today,

Somewhat predictably, it seems the 'fix' has lead to a string of EGR failures.
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Old 12-07-2017   #562
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Re: Volkswagen emissions scandal

I'm a member of the #fixfail group who has been driving this forward. And believe their a large number of disgruntled VAG customers
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Old 12-07-2017   #563
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Volkswagen emissions scandal

It's likely to be one of those situations where it's hard to say of the EGRs would have failed anyway. Let's face it, even fiat owners see a very high rate of EGR problems, I imagine if they launched a recall that changed major engine components, then any failure of any component after that point would get blamed on the work that was done.

Although with all said and done VW are still being very shifty about the whole thing, if nothing needed doing to UK cars then why do anything?

Realistically they're not going to win any court case against them.

Given the likely costs of any lost legal action, their current actions probably helps spread the costs over a period of years rather than having to pay for everything in one go.
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Last edited by AndyRKett; 12-07-2017 at 23:08.
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Old 13-07-2017   #564
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Re: Volkswagen emissions scandal

Quote Originally Posted by AndyRKett View Post
It's likely to be one of those situations where it's hard to say of the EGRs would have failed anyway. Let's face it, even fiat owners see a very high rate of EGR problems, I imagine if they launched a recall that changed major engine components, then any failure of any component after that point would get blamed on the work that was done.

Although with all said and done VW are still being very shifty about the whole thing, if nothing needed doing to UK cars then why do anything?

Realistically they're not going to win any court case against them.

Given the likely costs of any lost legal action, their current actions probably helps spread the costs over a period of years rather than having to pay for everything in one go.

From an engineering point of view I'd bet that the original emissions cheat kept the EGR closed during normal driving. The update no operates it as it should and they are seeing failures of valves that have sat closed most of their life.
I think a bigger concern id VW's insistence that there is no change in performance (the wider use including economy) or drivability post update. If there was no difference why did they do the cheat in the first place. It does sound like they are giving an extended warranty on the EGR valves post update. Typical Watchdog did not say VW paid for repairs but didn't say how much owners paid either so I assume they were free.
I would not have the update if I owned an affected vehicle.


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Old 13-07-2017   #565
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Re: Volkswagen emissions scandal

Quote Originally Posted by g8rpi View Post
From an engineering point of view I'd bet that the original emissions cheat kept the EGR closed during normal driving. The update no operates it as it should and they are seeing failures of valves that have sat closed most of their life.

I wouldn't assume anything with regards to what the fix entails, that said I seem to think the fix related to the fuel system, replacing the injectors in the 1.6 models and was a software update for the 2.0 litre engines. Opening the EGR valve shouldn't lead to shortened life span and some of the cars shown in the daily mail article above have relatively low mileage.

New cars break, there are 1.3 fiat diesels on here which have snapped their cam chain sub 50k miles, but if fiat had done a recall just prior to that failure for an injector replacement, many people would blame the recall for the fault. "Extra stress broke he chain".

This is the battle that VW face and the media are keen to keep reporting the story and keep it going as it sells papers.
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Old 18-07-2017   #566
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Re: Volkswagen emissions scandal

Quote Originally Posted by AndyRKett View Post
I wouldn't assume anything with regards to what the fix entails, that said I seem to think the fix related to the fuel system, replacing the injectors in the 1.6 models and was a software update for the 2.0 litre engines. Opening the EGR valve shouldn't lead to shortened life span.
Lets be clear here. Emissions exist due to combustion. The amount of emissions is roughly proportional to amount of substance burned and post combustion processes. Post combustion processes are the like of DPF filtering and EGR.

The injector change is directly fuelling (amount of fuel) related. I think we can safely assume that the 1.6 engine used the same injector as the 1.9/2.0 engines. To reduce fuelling one has three options. Reduce fuel pressure, reduce injector size or reduce injector time open.

Reducing fuel pressure reduces atomisation and thus burn quality and power efficiency so that is not a solution.

Reducing injector time open will work however one has to consider "range of control". In an ideal setup injector timing should use the entire possible width/range of control and not be forced to operate at on end of the timing scale or the other.

This leads me to believe that with the 2L injectors VW could not get proper granular control on fuel delivery because the injector size/hole is just too big and the ECU was bottoming out on timing and spending most of its time in the lower half/quadrant of the ideal injector window of operation.

Only was out of this and regain accurate control is to use a smaller injector.

Now for EGR which reduces NOX levels.

In rough terms more EGR = less NOX. Unlike a petrol engine burn a diesel engine burn is highly dirty with regard to particulate matter. These particles inevitably mix with oil vapour from piston ring leaked, block vapour recirculation and oil from turbo leakage. Net result is a filthy sticky goo that will and does clog up the workings of EG valves, swirl valves and inlet/plenum chamber sensors.

So the likely hood of component failure is increased with increases in goo and more goo is generated the longer EGR is active.

Sometimes digging oneself out of a hole is more difficult and complicated than avoiding the hole in the 1st place.
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Old 22-07-2017   #567
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Re: Volkswagen emissions scandal

Not a fan of VW by any means.

But what will be done about it? I can think of a million punishments for up guys responsible, and a few ways they can sort the problem or compensate owners but it seems like due to the size and amount of their cars on our roads nothing will be done.

The EU probably won't be too hard on them as they're one of the biggest tax payers and importers/exporters for the economy too.

It seems they can indeed get away with murder! Only the US seem to have taken it seriously, and I personally believe that's just because they want to improve sales of their own cars!
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