Tick over with a mind of its own

Mike1969 · 19 Jun 2021

Would value people’s opinions - 69 plate shuttle, manual. It has always ticked over at an indicated 800rpm. Recently it has, on occasions and not all the time, started ticking over at 950 / 1000 rpm mid journey, for about 20 minutes before returning back to 800rpm. Did it today - 2 hour journey - about an hour in 1000rpm at traffic lights. Drove another 15 mins before being caught at more lights - still ticking over at 1000rpm. 5 mins later and the next red light - back to 800rpm and stayed like that for the rest of the journey. Any ideas? Vehicle is under warranty but would feel better equipped dealing with them if any of you guys think you know otherwise I’ll likely get the main dealer ‘no fault found’ treatment. Cheers, Mike

mmi · 19 Jun 2021

Active DPF regeneration.
More here:

DPF Regen, Yellow Light & Adblue - Whats It All About? -

DPF Regen, Yellow light & AdBlue - Whats it all about? - The DFP light is becoming a more apparent issue with modern diesel vans, unfortunately, it’s a fact of modern diesel life. what is a DPF? Diesel particulate filters (DPF) are very effective in cutting emissions, trapping even the...

www.t6forum.com

DXX · 19 Jun 2021

Slap_ed said:
DPF Regeneration T28 Highline 150ps 2018

I think it’s poor that you don’t get some sort of warning light as to when the regen process starts. Yes the tickover revs rise to 1000, sometimes you get a smell, fan comes on and sometimes a performance change in the engine. My experience is only the revs at tickover rising to 1000rpm and fan on so it’s easy not to know that the process has started, unless you pull up at a junction. If I knew when this process had started, I could maximise the effect of the regeneration process by maintaining the revs between 2k and 3k rpm.

What are people’s thoughts about fixing a small LED warning light to the cooling fan power lead? The fan rarely, if ever comes on due to excessive coolant temperatures but we know it always comes on when the DPF is regenerating. This would then allow you to drive accordingly to hopefully maximise the DPF cleaning process.

Does anyone know if you can get a inductive pick-up coil that could simply be clamped around the fans power lead (doesn’t create warranty issues if they see a lead physically connected) so it can sense the power to the fan and hopefully put the warning light on. Can these inductive pick-up coils generate enough power to light a LED bulb?

Does this make sense?
Can you get an inductive pick-up coil?
Any other ideas?

Would it work?

Dellmassive · 19 Jun 2021

double posting !!!!!!