DPF wash out and rebuild

[h100vw]

Just quickly Greg.

What's the VCDS code to see the ash level?

I know it's under engine. My GT TDI is at 155,000km and it's rare for it do an active regen. Maybe every 6 weeks or so?

h Groups at once 070 and 075.
[Go!]
MVB 070.1: Regeneration Status (xxxxxxx1 = Normal Regeneration active, xxxxxx1x = Forced Regeneration active)
MVB 070.3: Regeneration Counter/Timer
MVB 075.1: Exhaust Gas Temperature before Turbo Charger
MVB 075.2: Exhaust Gas Temperature before Particle Filter
MVB 075.3: Particle Filter Load
MVB 075.4: Exhaust Gas Temperature after Particle Filter
Now Start the Driving Cycle and keep watching the Measuring Blocks (2nd Person required).

From here
Diesel Particle Filter Emergency Regeneration - Ross-Tech Wiki

Cheers
Gavin

[Greg Roles]

Channel 067 and 068 give you actual ash, and are interesting too, shows you the pressure difference, and if you hover ( with the update pack I believe, ) you get the pressure thresholds it should fall within. Basically at 300mbar it's game over.

I will do a full how to writeup on the weekend, still finishing my experiments, but it;s all good : )

Gav ol mate 075 and 070 are the soot levels and regen status, that you can regen down. "Particle filter load" refers to that regenerable component. Actual oil ash that eventually blocks the thing is called "carbon level" and is the whole problem, as it isn't regenerable. It does get confusing, with the soot regenning at 40% filter load, and the DPF clogging at 40g "carbon" ( ash ) load.

I'll do a how to / explanation on the weekend : )

[Greg Roles]

The Golf Mk5 GT TDI was a Euro 4 vehicle, as were Golf Mk5 TDI models without a DPF.

Mate whole point of the DPF was to meet Euro V - perhaps revisit your tech bulletins?? : ) Anyway who cares really, if you have one, it's going to need a wash eventually....and it friggen works. YAY!!

[Greg Roles]

A definitive write up will be a little while yet, the ECU is still learning and adapting, and I am yet to be convinced I have it totally nailed. It is all looking very good thus far, and my first regen didn't happen till mid 500kms, which is how I remember it used to be. It also regents down in far less time than when clogged, I guess I have gotten used to a full DPF.

Loving a cleaned one!

[poyta]

Good work Greg - this all looks very promising. Nice cheap option to get a bit of extra life out of it.

[stormshark]

Just quickly Greg.

What's the VCDS code to see the ash level?

I know it's under engine. My GT TDI is at 155,000km and it's rare for it do an active regen. Maybe every 6 weeks or so?

Sounds like Benough has the highest Km GT Sport on here would that be right? Im at 130k and considering the long term future of the car although i would like to keep if any others getting higher km with relatively few problems?

[Diesel_vert]

Mate whole point of the DPF was to meet Euro V - perhaps revisit your tech bulletins?? : )

Indeed, the DPF was certainly designed to the Euro emissions standards, but many vehicles could actually meet the Euro 4 standard without one.

But AFAIK, most Euro 5 vehicles are equipped with a DPF.


In regards to DPF cleaning, I found this link interesting:

2011 HDRG Summit - Presentations
(Download "An Overview of the DPF Cleaning Market")

Since automated DPF cleaning machines are available for heavy-duty vehicles, and with Greg demonstrating (many thanks!) that DPF cleaning in light-duty vehicles is possible as well (at least for a VW Golf), it would be nice to think that light-duty automotive manufacturers will eventually design an emissions system where the DPF is able to be more easily accessed, serviced and cleaned. One can only hope.

As per the presentation, the DPF cleaning market for trucks is predicted to increase and could potentially mean less cost, less rubbish and less pollution all round, and I'd like to think that people with cars will also benefit from that in the near future.

The technology appears to be all there, so all we need is commitment from the vehicle manufacturers.

[The_Hawk]

My 2010 Multivan seems to use UDS so I can't access the Measuring Blocks That said I managed to find an advanced measuring block for the pressure difference of the DPF and it was reading 4hPA on idle and up to about 70hPA or so while at peak revs/boost. This is with 68,000km on the clock.

In the end I gave up digging as I was just going around in circles, but it looks pretty good to me

[benough]

Just keep fanging it. I do with mine and at 160,000km, the DPF is fine.

[kaanage]

A definitive write up will be a little while yet, the ECU is still learning and adapting, and I am yet to be convinced I have it totally nailed. It is all looking very good thus far, and my first regen didn't happen till mid 500kms, which is how I remember it used to be. It also regents down in far less time than when clogged, I guess I have gotten used to a full DPF.

Loving a cleaned one!

Epic is the only way to describe what you have done here, Greg. It's threads like this that show the worth of the true enthusiast

[Mysticality]

Hmm... I wonder how long the 125CR will ACTUALLY take before the DPF fills up...
Mine's 13 months old and almost at (like 50km off) the 60,000 service. Oh, well... Guess I'll find out!

Excellent write up, by the way!!

[Valleyboy65]

Hi newbie here,

Reading with interest your clean out, good job, I have a 2.5 TDi transporter with a few issues and 215,000Klms.

I was just wondering how you know the core is so empty, ''the car is telling me the core is 0.0%'' are you running this VCDS software I have heard about on the forum. Is it good?

John

[h100vw]

Hi newbie here,

Reading with interest your clean out, good job, I have a 2.5 TDi transporter with a few issues and 215,000Klms.

I was just wondering how you know the core is so empty, ''the car is telling me the core is 0.0%'' are you running this VCDS software I have heard about on the forum. Is it good?

John

That's what he has John. Ross-Tech: Home with the sensor correctly calibrated it does tell you soot loading.

Gavin

[Greg Roles]

Yep I'll add the Ross Tech bit so you guys can sort the loading post washout, but I got it so clean by spending HOURS on the gurney, and washing it over and over and over. On full bore you canlt hurt the core at all, right up close, so you basically go to town, expect to get VERY wet, and the feedback is my DPF is still showing regens down to zero and only 5% ash at a -1.8% setting 5k later. Basically that means the ECU feels it is cleaner than 5 grams!

It's basically back to new, this washout method works, a treat. Car goes FAR better too, less restriction.

Thanks for the kind words, I do like pioneering : )









( when it goes well that is! )

[Greg Roles]

Hmm... I wonder how long the 125CR will ACTUALLY take before the DPF fills up...
Mine's 13 months old and almost at (like 50km off) the 60,000 service. Oh, well... Guess I'll find out!

Excellent write up, by the way!!

I would expect CR diesels to last FAR better, as the DPF design is a better one, CR is FAR kinder on soot production and thus the DPF, and the regen process has two valves in the system to ensure they work as intended. All the things that can go wrong in the MKV have been addressed in my humble opinion.

Use good fuel, and stretch her legs when you can, lots of small, start stop trips are to be avoided. Run excellent oil, and a Provent. Period.