AUTOiNFORM ONLINE MAGAZINE: DPF regeneration in vehicle diagnostics with David Massey

[@1cleandude]

Thanks for the video David, well done. Thank you for your time and expertise.

[@eoindowney651]

great video, clearly a guy who knows his stuff!

[@k8myx]

good video very helpful thanks

[@paulanderson79]

I've been using DPF cars since 2005. The first was a 2001 year model Peugeot 406. So far I've been lucky and have not experienced any running issues. The Peugeot is long gone, current car is a 2.2 Mazda 6 diesel.

[@keyboarddancers]

Looks like motoring is gonna get one hell of a lot more expensive as a result of these particulate filters on diesel and petrol cars it seems although we will be able to breathe better. We'll need to breathe better because of all the gasping which will be going on as we reach into our pockets to pay for the extra servicing these systems require!!

[@DiyMech]

Oh, DPF, sounds like an excellent money earner for the trade !

[@TomsShedProjects]

Looks very much like the 2.0 CRTDI to me. Can I ask for your reasons for advising not to use the flush treatment on a PD vehicle?

[@PepegaPig]

I may be wrong but that engine bay looks like a VAG range model which you shouldn't use engine flush treatments on (if it's a PD one). I'm not sure about CR engines (the TDI170s) but I know the BLS and a couple of other engine codes in the 105 and 140 range of TDI engines that have DPF's which are PD engines. But nevertheless thanks for the video. :)

[@techumr2521]

i have a similar problem. my 2006 jetta 36k miles lack of power, cloud of smoke when i rev over 2000rpm gas pedal but no smoke when idle. only driving weekend car person i got it from only driven small journeys. when changing gears hear noise or when cut the engine hear a noise like tubro dropping its a bad noise. why is this happening if only covered low mileage?

[@mlouden81]

Stumbled across this video and noticed more of the usual comments here seen from people that don't know what they're talking about regarding DPFs - makes me laugh. DPF problems (and any DOC or TWC problem for that matter) arise because of something else being faulty. In this case a faulty back pressure sensor (which are notoriously poor on VAG cars) prevented the car from having chance to perform a full active regeneration, at which point the DPF warning lamp will come on. Done without too much delay a simple sensor change (as diagnosed here) would have been all that was needed. VAG have particularly complicated systems that don't just rely on back pressure to know when filter is full, but also use their own calculated soot mass algorithm to help reduce the active regen frequency to save on the fuel penalty from each one. Using the recommended oil is very important - these usually have low sulphur and phosphorous content the help reduce the amount ash created during regens (you can't burn ash away). Soot will burn at 250°C in the presence of NO2 that is in the emissions under certain conditions. The active regen happens when not enough passive can take place before the DPF gets full; this as the guy in the video says is when the engine map is altered to generate ~650°C at which the soot will burn in O2 (always present). DPFs have been in production for 10 years now and compulsory for Euro5 onward certified vehicles (new models from Sep 2009). There's certainly no cheap fix about it, on the contrary it's a billion pound industry designed to improve air quality and therefore mortality rate because of (agreed) emission targets. Legislation also acts as a bit of a stick to beat OEMs with in order to push them to make their equivalent advancements otherwise they wouldn't bother because that cost them less. If you don't want one buy a gasoline car (although GPFs will be appearing on those too from 2017 :-) ). If you remove it now you'll fail an MOT by the way unless you've got a dodgy tester mate.

[@MINAJ24]

Where are you based? 2008 E60 LCI DPF LIGHT LOSS OF POWER?Had dpf jetted but still light on whats wrong?

[@Spyster007]

what are you using to flush the engine with?

[@spunkmonkey5000]

The days of my Ford Fiesta 1.1 popular with pull out choke and away you go..

[@roybm3124]

I don't believe in the passive regeneration, i haven't seen soot decreasing at temperatures under 500 degrees. Maybe the build up of soot is slower but its not getting less. Only when the active regeneration takes place. And you notice it because the car is getting noisier and less powerfull.

[@1cleandude]

You, my son, have hit the nail right on the head. This is piss poor design at its Best!! We the consumer (unknowningly) pay out the ass to buy this heralded engineering only to pay again their faulty design fails!! Quality and frequency of oil changes has very little to do with it. Terrible design!!

[@tspirit99]

Too much info for such a shit product! remove the dpf, delete the detection of the dpf sensor with software and REMAP and then drive! DPF technology are still early days! i have a bmw 330D e90 and i am yet to drill through the middle of my dpf as it is blocked up.

[@DiyMech]

So how do we control low fuel quality !, How do you know it's low fuel quality! are the big names the highest quality or are the food chains the highest quality, do we have factual proof ! Smoke and mirrors !! Just a thought.