DPF levels and regeneration - Page 7 - Club Touareg Forums
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post #61 of 93 Old 02-01-2019
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Quote:
Originally Posted by Odessa View Post
.... you seem to have a massive wealth of knowledge you are keen to pool into the community I for one am very appreciative of the extra knowledge thankyou
Well... I'm very stubborn and when my 2L TDI had issues about 5 years ago, everyone and everything I could find on forums about my problem was along the lines of "you need to replace the DPF". I refused to accept this, as my car was functioning perfectly in terms of performance otherwise, and my mechanical engineering and IT backgrounds were telling me that this would be impossible IF THE DPF WAS CLOGGED beyond repaid. Based on my practical mechanical and technology skills and comprehension of reality, I started reading every SSP program I could find on the engine\systems in order to find a solution. Eventually I did, and as a result I basically told the ECU that "I've replaced the DPF", to stop being a nanny, and to allow my emergency regen to take place.

Everyone at the time told me that I would burn my vehicle down as a result, and I will admit that I had concerns about it, but being so stubborn, I actually performed the emergency regen regardless, while driving down an empty freeway at illegal speeds, with a fire extinguisher by my side, while being OK with the idea of potentially having to pull over and watch my car burn to ash on the side of the road.

Other than that, I've had a few VWs in my past, raced\modified both cars\trucks and motorcycles, and have always done my own wrenching as much as possible..... plus been around a few forums and have had plenty of exposure to others who have provided both good and bad knowledge....

No one knows it all, but collectively, we know a lot.

Anyways, I just recently picked up the Touareg after the dieselgate, especially because I am very familiar with all that fiasco from still owning my Jetta and having gone through it all, and as a result, now I'm following the same "going to school approach" on the 3L system which is very similar to the 2L system.....

Why do I feel like I just had a job interview? LOL
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post #62 of 93 Old 02-02-2019
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Awesome good man..... insight is always a precious tool thank you although you didnt need to go that far.






Quote:
Originally Posted by TurboABA View Post
Well... I'm very stubborn and when my 2L TDI had issues about 5 years ago, everyone and everything I could find on forums about my problem was along the lines of "you need to replace the DPF". I refused to accept this, as my car was functioning perfectly in terms of performance otherwise, and my mechanical engineering and IT backgrounds were telling me that this would be impossible IF THE DPF WAS CLOGGED beyond repaid. Based on my practical mechanical and technology skills and comprehension of reality, I started reading every SSP program I could find on the engine\systems in order to find a solution. Eventually I did, and as a result I basically told the ECU that "I've replaced the DPF", to stop being a nanny, and to allow my emergency regen to take place.

Everyone at the time told me that I would burn my vehicle down as a result, and I will admit that I had concerns about it, but being so stubborn, I actually performed the emergency regen regardless, while driving down an empty freeway at illegal speeds, with a fire extinguisher by my side, while being OK with the idea of potentially having to pull over and watch my car burn to ash on the side of the road.

Other than that, I've had a few VWs in my past, raced\modified both cars\trucks and motorcycles, and have always done my own wrenching as much as possible..... plus been around a few forums and have had plenty of exposure to others who have provided both good and bad knowledge....

No one knows it all, but collectively, we know a lot.

Anyways, I just recently picked up the Touareg after the dieselgate, especially because I am very familiar with all that fiasco from still owning my Jetta and having gone through it all, and as a result, now I'm following the same "going to school approach" on the 3L system which is very similar to the 2L system.....

Why do I feel like I just had a job interview? LOL

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post #63 of 93 Old 02-17-2019
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From my own experience (T3 2013 V6 TDI Touareg) the "passive" burn of the soot in the DPF deosn't happen until I'm cruising at about 85MPH.
You can tell this is a German car if they think Autobahn speeds are the norm !

The android app "VAG DPF" in combination with a cheap Bluetooth ELM327 ODB device gives a very good overview of the state of the DPF without resorting to VCDS.

This screen shot was taken with the engine off, but when cruising there is a line above the picture of the DPF which shows a positive or negative figure showing the quantity of soot being add to or burn from the DPF.

When an active regen is taking place the bottom 3 tiles "post injection x" will show non zero numbers. I think it's the quantity of extra fuel injected at those locations.
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post #64 of 93 Old 02-17-2019 Thread Starter
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Quote:
Originally Posted by Tadger View Post
From my own experience (T3 2013 V6 TDI Touareg) the "passive" burn of the soot in the DPF deosn't happen until I'm cruising at about 85MPH.
You can tell this is a German car if they think Autobahn speeds are the norm !

The android app "VAG DPF" in combination with a cheap Bluetooth ELM327 ODB device gives a very good overview of the state of the DPF without resorting to VCDS.

This screen shot was taken with the engine off, but when cruising there is a line above the picture of the DPF which shows a positive or negative figure showing the quantity of soot being add to or burn from the DPF.

When an active regen is taking place the bottom 3 tiles "post injection x" will show non zero numbers. I think it's the quantity of extra fuel injected at those locations.
Thanks for sharing thisTadger!
Will be getting this bt dongle!

Btw passive regen occurs around town at low speeds as well, atleast for me, and on the highway here at speeds much lower.
I have recorded regen at 70-80 kmph

Would be great to have this info as in the app, displayed on mfi or nav screen.
We need a vag programmer!

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post #65 of 93 Old 02-17-2019
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Quote:
Originally Posted by Tadger View Post
From my own experience (T3 2013 V6 TDI Touareg) the "passive" burn of the soot in the DPF deosn't happen until I'm cruising at about 85MPH.
Makes sense, because for the burn to happen a relatively high temperature needs to be reached.

Quote:
Originally Posted by Tadger View Post
You can tell this is a German car if they think Autobahn speeds are the norm !
They do not think this is a norm. Rather this (ie. at speeds above 85 MPH) is where the burn will unavoidably happen, because the exhaust gets so hot, that it ignites the soot. This is not a controlled process - at least not in the terms of the ECU initiating it intentionally.

Quote:
Originally Posted by Tadger View Post
When an active regen is taking place the bottom 3 tiles "post injection x" will show non zero numbers. I think it's the quantity of extra fuel injected at those locations.
Yes. But as you said, that's the active regeneration, when the ECU itself is initiating and controlling the burn process. And this will also happen at speeds way below 85MPH, whenever necessary, because passive regeneration not happening or not happening fast and frequently enough.
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post #66 of 93 Old 03-14-2019
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My situation seems strange.

I have the DPF measurements from my 2013 Exec


and then the one from my 2015 GSW


Is the GSW's high measured soot load due to the dealership not really replacing the DPF a few months ago during phase 2 fix or a sensor malfunction?
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post #67 of 93 Old 03-14-2019
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Soot load fluctuates up and down. It's the ash that you need to look at.
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post #68 of 93 Old 03-15-2019 Thread Starter
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GSW?
If the soot continues to build and a regen cannot occur due to short runs then car will go into limp mode.
Ash levels overall indicate how full your dpf is and when it gets full of ash it needs to be replaced

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post #69 of 93 Old 03-15-2019
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Quote:
Originally Posted by Singh View Post
GSW?
2L TDI terminology..... Golf SportWagen
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post #70 of 93 Old 03-15-2019
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Quote:
Originally Posted by TurboABA View Post
Soot load fluctuates up and down. It's the ash that you need to look at.
Good point, I'll check that right now. I just haven't seen anyone report such a high load before, that particular measurement has only been increasing and not fluctuating lower, and the delta between Calc and Meas is so wide it seems like an issue. I expected it to look like the Touaregs values.
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