EGR Issues - Ongoing problem.

[DXX]

Carbon deposits should normally be removed from the cooler by means of the exhaust gas flow. The fact that carbon is building up and not being able to be removed by the exhaust gas flow is suggesting that something else is preventing this. The only other substance that can get into this area is oil that has come into contact with the combustion process.

Any fluid, liquid or gas which is in laminar flow will have an almost static flow where it contacts the cooler tubes.
I agree that if lube oil is carried over it will make the problem worse but overall the cooler doesn’t have the additional capacity to allow for an acceptable interval between servicing. As with most things under the bonnet it’s a case of squeezing it in.
Different subject but the cause of many machinery issues these days; most design engineers I’ve worked with in recent years don’t have a clue about maintenance, that’s the downfall of hiring graduates and not promoting from the experienced workers.

 

[Handyman]

I've had somebody offer to 'remap' the EGR which I believe bypasses the purpose of it. Been quoted £300 for this but not sure if this is a)legal or b) advisable. Does this impact the MOT etc? Anybody got any inside info on whether this is a valid way of resolving ongoing EGR issues?

It is illegal to modify any part of the emissions management system. VW need to find a fix to the sooting up problem.

 

[DXX]

Effects of oxygen enriched combustion on pollution and performance characteristics of a diesel engine

Oxygen enriched combustion is one of the attractive combustion technologies to control pollution and improve combustion in diesel engines. An experime…

www.sciencedirect.com

How to improve combustion, bit of a draw back is the NOx.
Cut to 4. Conclusion if you’re nodding off.

 

[DaveD]

It is illegal to modify any part of the emissions management system. VW need to find a fix to the sooting up problem.

Illegal in what legislation, i.e quote me the Act and Section.

 

[DXX]

Illegal in what legislation, i.e quote me the Act and Section.

Modifying your vehicle’s emissions: the legal, safety and health implications

www.gov.uk

 

[DaveD]

Modifying your vehicle’s emissions: the legal, safety and health implications

www.gov.uk

"Making changes to the engine management, emissions control, exhaust or braking systems carry the highest risk of unintended consequences."

So all of the members of this forum who have had remaps carried out are breaking the law by that definition.
Oh dear.

 

[DXX]

"Making changes to the engine management, emissions control, exhaust or braking systems carry the highest risk of unintended consequences."

So all of the members of this forum who have had remaps carried out are breaking the law by that definition.
Oh dear.

You asked, IMO legislation and enforcement is only going to get tighter.
The easiest way to control emissions is to use GPS to regulate top speed and acceleration. Simple but nobody is doing it.

 

[DaveD]

You asked, IMO legislation and enforcement is only going to get tighter.
The easiest way to control emissions is to use GPS to regulate top speed and acceleration. Simple but nobody is doing it.

Perhaps that's coming in the future. Trouble is, if you're driving 44 tonnes of HGV there is no real way to reduce emissions beyond a point that they're probably close to already, even reducing top speed and acceleration can only achieve so much.
When they introduce legislation and then just expect people to know about it, such as the changes to the Construction and Use regulations that you linked, that isn't realistic. I've seen no publicity on the Con and Use regs changes that very few people will look at unless prompted.
There must be many many vehicles out there that have been modified in some way that falls foul of the law now and most owners have no idea, that's hardly fair.
Anyway, enforcement won't happen unless it is an MOT fail.

 

[mmi]

California Will Start Testing for ECU Tunes During Smog Checks Starting Next Week

If your car isn't running the factory software or a tune approved by the California Air Resources Board, you'll fail the test.

www.roadandtrack.com

 

[DXX]

Perhaps that's coming in the future. Trouble is, if you're driving 44 tonnes of HGV there is no real way to reduce emissions beyond a point that they're probably close to already, even reducing top speed and acceleration can only achieve so much.
When they introduce legislation and then just expect people to know about it, such as the changes to the Construction and Use regulations that you linked, that isn't realistic. I've seen no publicity on the Con and Use regs changes that very few people will look at unless prompted.
There must be many many vehicles out there that have been modified in some way that falls foul of the law now and most owners have no idea, that's hardly fair.
Anyway, enforcement won't happen unless it is an MOT fail.

I agree but there are people in business who’s ‘bread and butter’ is mapping and other emissions mod’s.
In effect they are peddling illegal trade but the Gov.UK publication states it’s the vehicle owners responsibility.

 

[DaveD]

California Will Start Testing for ECU Tunes During Smog Checks Starting Next Week

If your car isn't running the factory software or a tune approved by the California Air Resources Board, you'll fail the test.

www.roadandtrack.com

I've no idea how my local independent garage would ever be able to know if my van has been mapped, unless it fails the emissions test.

 

[huw169]

California is a very very special case. They have the California Proposition 65 where they have 65 band substances that ‘could’ hurt you. There are significantly more on the list now. Anything supplied in needs a declaration.

MOT is the only current way to police this and there is no way they would know anything about EGR unless it’s totally missing. Same for DPF. Not sure they are allowed to open the bonnet though as they are certainly not allowed to remove anything to inspect. Currently anyway.

As for a MAP check. That would be easy and inexpensive through a Bluetooth OBD device. Just need to bung Carista or someone a few quid to add it.

I hate the EGR with a passion, but understand it’s purpose. Not so concerned about DPF.