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General => The garage => Diagnostics - VagCom / VCDS => Topic started by: The Doc on 12 June 2011, 07:45

Title: How to check DPF filter clogging or loading on a VW TDI or Audi TDI
Post by: The Doc on 12 June 2011, 07:45
Plug the VCDS cable into the OBD2 port and start the software.  The Ross tech VCDS tool or dealer tool is required to view this info, next click on "Engine".

Click on "Meas. Blocks" and select group 075.  The 3rd number block is the particle filter load.
Title: Re: How to check DPF filter clogging or loading on a VW TDI or Audi TDI
Post by: Rhyso on 12 June 2011, 14:10
Very useful  :nerd:

I logged Adam's and mine yesterday; Adam's was at 0% and mine was showing 5.2%  :nerd:

Will re-log mine tomorrow to see if the journey back has burnt some of that off  :smiley:
Title: Re: How to check DPF filter clogging or loading on a VW TDI or Audi TDI
Post by: Rhyso on 13 June 2011, 10:10
Urm nope!  Lambda now showing 10% this morning  :huh:

Best give it some stick this week  :evil: :undecided:
Title: Re: How to check DPF filter clogging or loading on a VW TDI or Audi TDI
Post by: Rhyso on 22 June 2011, 20:03
Quote from: Rhyso on 13 June 2011, 10:10
Urm nope!  Lambda now showing 10% this morning  :huh:

Best give it some stick this week  :evil: :undecided:

Giving it stick saw my DPF levels rise to 45%  :lipsrsealed:

Nice bimble down the motorway today and levels are back to 9.5%  :nerd:
Title: Re: How to check DPF filter clogging or loading on a VW TDI or Audi TDI
Post by: Agreeable Slick on 22 June 2011, 20:14
Quote from: Rhyso on 22 June 2011, 20:03
Quote from: Rhyso on 13 June 2011, 10:10
Urm nope!  Lambda now showing 10% this morning  :huh:

Best give it some stick this week  :evil: :undecided:

Giving it stick saw my DPF levels rise to 45%  :lipsrsealed:

Nice bimble down the motorway today and levels are back to 9.5%  :nerd:

:wink:
Title: Re: How to check DPF filter clogging or loading on a VW TDI or Audi TDI
Post by: Rhyso on 22 June 2011, 20:19
Quote from: Agreeable Slick on 22 June 2011, 20:14
Quote from: Rhyso on 22 June 2011, 20:03
Quote from: Rhyso on 13 June 2011, 10:10
Urm nope!  Lambda now showing 10% this morning  :huh:

Best give it some stick this week  :evil: :undecided:

Giving it stick saw my DPF levels rise to 45%  :lipsrsealed:

Nice bimble down the motorway today and levels are back to 9.5%  :nerd:

:wink:

Interestingly I'm fairly sure I could detect the DPF regenerating as it felt a little sluggish to pick up and there was what felt like a stutter or two  :undecided:  Only happened on the way to Newport, on the way back it seemed a lot smoother  :smiley: 

The levels might have dropped further but some fool in a what I can only assume was a remapped MK4 TDi (smoking heavily) tried it on  :grin: :grin:
Title: Re: How to check DPF filter clogging or loading on a VW TDI or Audi TDI
Post by: Agreeable Slick on 22 June 2011, 22:13
Depends on how the DPF regens itself, if it suddenly drops a load of particulate then it will stutter slightly due to mass flow through the exhaust changing suddenly. Plus it will be cycling some of your fuel back in to the exhaust hence it tends to regen around 50-70mph steady state driving so you won't notice it much.
Title: Re: How to check DPF filter clogging or loading on a VW TDI or Audi TDI
Post by: adi on 23 June 2011, 07:58
To carry out a forced regen on the dpf audi recomend to be in 4th gear at around 2500 rpm speed approx 40-50 mph also can not be done in cruise control.
Title: Re: How to check DPF filter clogging or loading on a VW TDI or Audi TDI
Post by: Rhyso on 23 June 2011, 09:15
Quote from: Agreeable Slick on 22 June 2011, 22:13
Depends on how the DPF regens itself, if it suddenly drops a load of particulate then it will stutter slightly due to mass flow through the exhaust changing suddenly. Plus it will be cycling some of your fuel back in to the exhaust hence it tends to regen around 50-70mph steady state driving so you won't notice it much.

Cool; it was those sorts of speeds I was doing  :smiley:  Nice to know its doing its job.......:afro:
Title: Re: How to check DPF filter clogging or loading on a VW TDI or Audi TDI
Post by: Keithuk on 29 May 2012, 10:59
You can force a Diesel Particle Filter Emergency Regeneration (http://wiki.ross-tech.com/wiki/index.php/Diesel_Particle_Filter_Emergency_Regeneration) with VCDS.

Sorry I've just seen another sticky with this in http://www.golfgtiforum.co.uk/index.php?topic=196530.0