So does mine. I can tell immediately that it’s doing a regen. Don’t need to see it tickover at 1000rpm.
DPF Regen Frequency / Issues / Force discussion.
- Thread starter GordyT6
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I have a question or two. I have an old t5.1 CFCA 180 BiTDI (DSG 4motion). Retro Resus fitted a new DPF in 2023 and blanked and mapped the EGR and watched the oil consumption rise over the next few months. Spring 2024 new VW create engine, turbos, flywheel etc. 8k miles now on the clock and multiple oil and filter changes running in. Now changing after every 5k miles.
So on a run the DPF is doing regens every 150~200 miles (217 miles max), around town which is not very often, is about 100 miles plus.
Question I have is it seems very reluctant to regen in any situation except blasting down the A3 or M4, I was wondering being a 4motion is the dpf that much further away from the engine so doesnt really get hot enough to kick in, just a thought. A couple times recently it has failed to regen and then hit 101% in the DPF app, and until I took it for a blast. What do you all think? Paranoid? Problem is also around here the traffic is horrendous so trying to go for a blast is a late at night thing really
So on a run the DPF is doing regens every 150~200 miles (217 miles max), around town which is not very often, is about 100 miles plus.
Question I have is it seems very reluctant to regen in any situation except blasting down the A3 or M4, I was wondering being a 4motion is the dpf that much further away from the engine so doesnt really get hot enough to kick in, just a thought. A couple times recently it has failed to regen and then hit 101% in the DPF app, and until I took it for a blast. What do you all think? Paranoid? Problem is also around here the traffic is horrendous so trying to go for a blast is a late at night thing really
Mine too - to the point of being a bit dangerous this morning towing a 2000kg trailer and trying to pull into moving traffic....
(Roll on warranty expiry when the DPF can 'do one' !!!!)
When my T6 204 BiTDI DSG LWB shuttle does a regen I don't really notice and issue when driving other than a bit of hesitancy when pulling away. However if mid regen, when I'm manouvering slowly, worse in reverse(?) i get an awful whistling sound almost like a roof rack whisling at 80 mph and the engine hunts up and down making a real racket. Noise is loudest towards base of windscreen. Anybody any idea what this could be. sounds awful! I wondered if the regen has an effect on ac vents, maybe to stop fumes and mine aren't fully closing causing whistling? noise stops though as soon as pressure is released from accelerator.
In reverse, it automatically puts the air recirculation on, and mine changes the note of the heater fan.
that's the accepted wisdom, but I usually don't as you don't know how far into the process the regen is. If you interrupt the cycle before it ends, it starts from scratch the next time the van starts.
Thanks, that's what I assumed. Sat and had a coffee and it took around 15/10 minutes so assume it wasn't too far off (no idea how long the process takes from start to finish!).
@MarkS25 I had a visit from a VW Assist guy who seemed a lot more clued up than others I have spoken to. His advice if arriving at a destination was to wait until the revs drop down to normal (ie 800rpm), then a few seconds longer. The van has now stopped doing the regen, so safe to switch off. On the next journey the van will CONTINUE its regen (it wont start from scratch again as it will have reduced the soot level already.)
That makes sense
So he said if the van drops to its normal thick over level, it will restart on the next journey? I was under the impression that once the regen had finished the revs drop back down. Odd that mine (on a couple of occasions now) has done this when I've gotten home and not restarted for some time again - certainly not on the next few journeys.
My 2020 6.1 will finish a regen at idle, but I prefer to take her out for a few miles further to let the regen complete at driving revs. When you have to, or are forced to turn ignition off during a regen, the regen should continue the next time you do a journey.
According to my vag dpf app I am currently at 98% and naturally when I get to my mother's in Worcester later today after a 40 mile drive the regen will probably start as soon as I'm close to her house!
If that happens I will drop off the doggo and go for a little drive. Again, no real need, I just sleep better that way!
Get that vag dpf app or apple equivalent, great to keep your eye on things... you'll need either carista or any OBD communication gizmo.
According to my vag dpf app I am currently at 98% and naturally when I get to my mother's in Worcester later today after a 40 mile drive the regen will probably start as soon as I'm close to her house!
If that happens I will drop off the doggo and go for a little drive. Again, no real need, I just sleep better that way!
Get that vag dpf app or apple equivalent, great to keep your eye on things... you'll need either carista or any OBD communication gizmo.
I have been taught to be cautious with these delicate creatures!
I bet you have a lovely touch
It’s fine to switch off once the revs drop to normal. This negates the risk of oil dilution due to fuel from the regen.
Next time you drive the van it will carry on with the regen. I have checked this many times since the tech told me using vcds and mostly VAG DPF.
Edit: Idling does not complete the process unless it’s close to finish anyway.
I’m sure it does finish regen if you are stood still in drive
Derek99B
Member
A few points, probably covered elsewhere, but....
I've got a Carisma plugged into the diag socket and the VAG DPF app on my phone.
I can see exactly the soot mass and when fuel is being added to burn off the carbon.
As I drive along, after about 170 or so miles the soot reaches 30g and the regen kicks in. The light does not come on the dash.
The burn takes around 12 miles to come back down to 9g. Then the burn stops.
If I want to stop during a burn, I switch off the engine, then back on again for around 30 seconds to clear fuel from the inlet side. (At about a minute it starts a new burn by adding fuel, so only 30 seconds). Then I turn the engine off and get on with whatever.
So no need to take it on a long run, I do mostly 15-20 mile runs so it all works fine for me.
Have fun... Derek
I've got a Carisma plugged into the diag socket and the VAG DPF app on my phone.
I can see exactly the soot mass and when fuel is being added to burn off the carbon.
As I drive along, after about 170 or so miles the soot reaches 30g and the regen kicks in. The light does not come on the dash.
The burn takes around 12 miles to come back down to 9g. Then the burn stops.
If I want to stop during a burn, I switch off the engine, then back on again for around 30 seconds to clear fuel from the inlet side. (At about a minute it starts a new burn by adding fuel, so only 30 seconds). Then I turn the engine off and get on with whatever.
So no need to take it on a long run, I do mostly 15-20 mile runs so it all works fine for me.
Have fun... Derek
The regen will stop if you sit in park or neutral for to long.
But will carry on is in drive...
As above VAG DPF speed you all you need to know.
But will carry on is in drive...
As above VAG DPF speed you all you need to know.
Derek99B
Member
And also there are other things that prevent a burn.
If the low fuel light is on it won't burn. But the carbon keeps growing, so not filling up enough to turn off the light allows carbon to go above the next threshold, somewhere around 40g, (But I've not recorded it). might be as high as 50g. Then when you do a big fill up the regen light comes on and it set the burn process in motion.
It won't burn with low water temparature.
If the low fuel light is on it won't burn. But the carbon keeps growing, so not filling up enough to turn off the light allows carbon to go above the next threshold, somewhere around 40g, (But I've not recorded it). might be as high as 50g. Then when you do a big fill up the regen light comes on and it set the burn process in motion.
It won't burn with low water temparature.
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