Treading the old DPF waters… sorry!

[Nath.]

20.7%

I don't understand it TBH, I thought it would go down.

How on earth I had a reading of 14% before I started is beyond me considering that the car gets driven totally wrong (short trips) most of the time and what I did in her today is meant to be the best thing for it.

I dunno

 

[FinGerS o FuDgE]

That's similar to what happend to mine. I had mine down to about 3% and since then it has only gone, even though I have kept the revs @ 2000-2200rpms in order for it to 'burn off'.
That's why I think it won't burn anything off until it hits a certain %. Then it will go into regen mode..?

It's a stupid design TBH. Really don't see why keeping at the right revs for a long journey should decrease it - But it doesn't.

Think I'll just go down the J** route now and get the DPF Deleted & remapped. I was in two minds about it, but now that AndrewJB seems to have solved the stuttering issue, it is looking even more promising..!!

 

[/dev/null]

It also depends what load the engine is under, not just the revs - more load means more fuel burnt and more fuel burnt means more soot! On the flip side, less load means less work for the engine - means less fuel burnt, which in turn is less temperature which means it's not hot enough to burn it off!!

 

[McDubber1]

Thanks for the info guys i think i will know for definate now when/if it goes into regen mode.

I'll keep an eye on this thread as i've found it interesting and informative and helps me learn more about my car.

Cheers again.

 

[FinGerS o FuDgE]

Pretty sure a regen kicked in on the way home just now. Had the wife and kid instead of a laptop though, so unsure what he DPF was at. I'm guessing it would have been early 20's%

Glad this topic is helping others too. We are still all unsure on how this all works correctly , so it's good to know we are getting somewhere

 

[/dev/null]

One thing I would be interested is in where are these "parameters" held? If it could be set so that first stage regen kicked in a 30% instead of 20% then that might give it a bit of a chance to get burnt off normally before starting regen mode.

 

[Nath.]

No sign's of any attempted regen sinse my last check and the loading was at 20.7% so I looked this evening and it's at 40.8% now.

I'm going to charge up the laptop, plug in Vag-Com and go for a spin, see if I can get it upto 45% and watch an active regen at work. Wish me luck.

 

[ash101]

Rite Guys i cant work this one out.As i said in earlyer post in this thread i done a forced regen about a month ago and got it down to 0%.
I checked it again about a week ago and it had gone up to 3.6%.
Driving the car today and it went in to 1st stage regen ie.lumpy idle a bit under powered and idle increased slightly.
So got home ran vagcom and soot load is now 22%.

I cant uderstand how it can increase by over 18% in a week even though I havnt done anything different just the normal comute to work etc.

Any ideas!!

 

[Nath.]

OK I have some info for those that are interested.

I took the car out for a good ragging with VC running and took the soot level from 40.8% up. The level reached exactly 45% and then started to reduce very quickly, I guess a regen kicked in. I can honestly say that there was no lumpy or fast idol, no funny clattering noises, no smoke, no lack of power and no funny smells, I honestly would not have known it was in regen. Anyway I continued to drive on the motorway at a steady 60 on the cruise and the level dropped very quick to 20%. I came off at the next junction and turned round and headed back home on normal a roads whilst the level dropped to 2% then it started slowly going up again. When I got home it was on 4% and I guess that it only took about 2 miles for it to go up from 2% to 4%

I did notice that whilst in regen the exhaust temps shot up and at times hit 800 degrees as soon as it hit 45%. The temps calmed down again after was reached 2%. I found that whilst in regen it did not matter how I drove the level always came down unless I was stationary. I also now know that during normal driving, even at 60 on the cruise the soot level still climes but only slowly so I expect to check in the next few days and be on maybe 20% I guess.

Hope this helps

So mine went from 14% to 40% in 3 weeks. and about 150 miles of silly short trips of 2-3 miles each. Next is a forced regen when I feel brave.

IMO the OP of this thread is a hero and needs a beer

 

[Alzak]

Hi

I do have small problem with my leon the value on lambda is 10.8 but car is in 1st stage regen how it is possible??

 

[Nath.]

Regen normally starts at 45% so I would say that you have interupted it in the middle of a regen and it is currently at 10.8%, if you drive it steady for a bit longer it should go down to 0% or there abouts and regen will stop. I think that if you interupt it 3 times during a regen, this is when the DPF light will come on.