Hi, you're not doing anything wrong, this is indeed a bug. It's being fixed as we speak - let's see how quick Apple are to review it
Watch this space!
Best DPF Monitoring App?
- Thread starter Tsixty
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Watch this space!
@T6 Syd this has now been fixed - please fetch the latest version from the App Store.Hi, you're not doing anything wrong, this is indeed a bug. It's being fixed as we speak - let's see how quick Apple are to review it
Watch this space!
Perhaps you've auto updated?Not showing any update to the version downloaded yesterday yet, but I'll give it time
Thanks.
Nope, just my updates coming through slowly, It is there now and dowloaded, but I'm not in my van today so can't check it.
Thanks again, very useful app, except it is disconcerting watching the bar climb from just over 20% to 70% in about 80 miles mostly 50 to 70 mph - suggests maybe just over 100 miles between regens :-(
Thanks again, very useful app, except it is disconcerting watching the bar climb from just over 20% to 70% in about 80 miles mostly 50 to 70 mph - suggests maybe just over 100 miles between regens :-(
What's your oil ash percentage? Hit oil ash residue and it'll change to a percentage.
Mine is on 105k, ex Arnold Clark hire/lease van, 82k when I got it.
All is going well with the app but I have some questions.
Here is a series of screenshots I took today in the lead up and during a regen to help explain my queries:
Just moments before the regen:
What do the "post injection" 1-3 boxes mean and why do I only have a figure in "post injection 1"?
With the regen underway all 3 "Post injection"fields are populated. Why only during a regen so these boxes populate and why are they so wildly different to each other?
2 miles down the road after regen started and all looks normal? Why does the soot mass measured fall so much faster than the soot mass calculated? What's the difference?
Five miles into the regen and the soot mass measured is negative.... how and why?
On completion of regen I am left with a calculated soot mass of just under 9mg. Is that normal? Why isn't it nearly zero? Why is the soot mass measured a negative figure of -8.49mg?
Sorry for all the questions @IWMTom. Just working out what I'm looking at.
Also how's the CarPlay element progressing?
Post Injection is how the ECU raises exhaust gas temperatures to burn off soot. See page 60 of https://pics.tdiclub.com/data/517/820433_EA288.pdf.
It is normal for the values to only be populated during a regeneration. The ECU decides how much fuel to inject and when. The three values correspond to the post-injections referred to in the Self Study Programme I've attached above.
The ECU provides two mechanisms for measuring soot mass. The main value used by the application is Soot Mass Calculated. This is what the progress bar uses.
I don't have all of the information to fully explain the difference between the values (they're both available, and I display them accordingly). What I do know is that Soot Mass Measured does not take into account the Differential Pressure sensor. This means that when the Differential Pressure sensor fails, Soot Mass Measured is now the only true source of soot mass. As soot mass reaches field thresholds (the point at which your vehicle will attempt a regeneration), both values (calculated/measured) will become close to one another. It's unknown as to why the VAG engineers have negative values in the early stages of soot filling.
Your primary focus should be on Soot Mass Calculated.
This is normal. It is impossible to burn off all soot. As the condition of the DPF worsens and oil ash content increases, the end of the regeneration procedure will be at higher levels of soot. Unfortunately, this does mean that regenerations become more frequent as the vehicle ages.
Additionally, as the amount of soot decreases, more fuel is required to be injected to continue burning. The ECU is programmed to stop the regeneration process at a suitable time that balances efficiency. Yes, the next regeneration will occur sooner, but that is countered by using less fuel at the end of the cycle.
Reasonably well. Few hurdles that are being jumped, and I'm still trying to decide on how/what data will be displayed. Apple force you to use predefined templates which somewhat limits creative freedom...
A preview of a current draft:
Last edited:
The current draft above is functional, but not stable. MrFix did a YouTube Short of it as a demo:
I'm still aiming for end of the year.
That's normal, see post 171 above for an explanation.
Best DPF Monitoring App?
Hi Tom, I have a CXHA engine and I'm using group 3, is that correct? I had an odd value for miles since regen, but I think the time since regen looks OK and the other values seem to be of the right order. Having updated the app today the miles since regen is still strange. Screenshots...
I’ve just purchased the app and will be tinkering over the weekend as I have no idea when my t6 regens so looking forward to some insight. I have carista - to get the benefit of real time data and warnings, but is it ok to leave it plugged in 24/7? Carista don’t recommend it. Will it drain the starter?
Can't comment on Carista but I have a VGate iCar Pro and I leave that in permanently. It goes to sleep after a while.
I don't believe it's been tested, but it should do. Please do give it a go and let us know. Thanks.
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