Hi,

I've tried clearing the DPF by the prescribed method in the owners manual (and have also given the engine high revs) to try and unblock it, all to no avail.

How much does it typically cost at a dealer?

How long does it normally take for it to be done?

Is there somewhere not to far away from me (Derby) that people recommend for this?

Thanks

Is the DPF light flashing? If not and the light is just on, it just needs a good thrash.

The orange exhaust light is on constantly and the glowplug light starts flashing within a minute or two of starting up.

The orange exhaust light is on constantly and the glowplug light starts flashing within a minute or two of starting up.

Sounds more like a faulty sensor......I would find someone local with VCDS unless you have Skoda Assistance or you are under warranty?

Thanks jrw - will do.

Agree with JRW. Sound like a sensor. I've never heard of a dpf on the 1.6cr engine ever clogging. Let us all know if you will what happens. Good luck...andTa!

Have you got Skoda Assist?

If you're worried about, try using an additive such as Millers every couple of tanks. Personally, I notice a difference in the way the car feels, but I haven't noticed a DPF regeneration since I used it (even though I believe VAG engines do a default one every 600 miles). Saying that, if it has been doing regens, it's certainly made them smoother.

Oh and revving the nuts off it just creates more soot. Sat at around 2000rpm (from memory) for a good 30 mins should turn light off, hence m-way driving. If it's a sensor (which I had go on my Octy) then it's straight forward. In fact it's that common that Skoda Assist vans carry the part with them!

same thing on my seat leon 2l tdi fr faulty sensor

Oh and revving the nuts off it just creates more soot. Sat at around 2000rpm (from memory) for a good 30 mins should turn light off, hence m-way driving. If it's a sensor (which I had go on my Octy) then it's straight forward. In fact it's that common that Skoda Assist vans carry the part with them!

Rubbish. It may create slightly more soot but crucially it is creating pressure and heat which in turn clear out the engine, turbo, EGR, DPF and exhaust. Without heat and pressure the DPF simply can't work. The worst thing you can do to a diesel is not thrashing it once in a while (and i don't mean just sit there revving it, i mean accelerating up to the redline whilst under load..ie uphill).....It does them the world of good.

What do you see when any non dpf diesel boots it?

A mound of soot flying out the exhaust! On a dpf that just gets caught.

Too much shoves the fumes through the exhaust system too fast to fully heat up and too little doesn't get it warm enough of course.

This is coming from a Skoda Assit tech a we were sat in my octy clearing the dpf on my drive.

Sat at 2000ish rpm on mway for example is best. Hot enough without soot creation.

What do you see when any non dpf diesel boots it?

A mound of soot flying out the exhaust! On a dpf that just gets caught.

Too much shoves the fumes through the exhaust system too fast to fully heat up and too little doesn't get it warm enough of course.

This is coming from a Skoda Assit tech a we were sat in my octy clearing the dpf on my drive.

Sat at 2000ish rpm on mway for example is best. Hot enough without soot creation.

I own a PD so i know what you see - a build up of cr@p from the above mentioned engine system. On a DPF car it gets caught but then quickly burned off if you are 'making progress'. Could be one explanation why i haven't had a turbo or EGR go on my PD (when many others have at much lower mileage) and why i haven't seen a DPF light on on my CR and you have :p

So based on your theory, answer me this:

Why when 'booting' the Bora to clear out my exhaust does the plume of smoke which you say is caused by high RPM stop after a few seconds? Why does this plume not come back on any subsequent 'bootings' unless i have been sat in traffic or cruising without the engine doing any real work?

All it takes is a few seconds of thrashing once a week to clear out the system (longer on a DPF to ensure that the system is properly heated) and keep things running smoothly. This is why my EGR is still clean at nearly 100k and my mates identically engined Polo needed a new one at 80k (was the same journey to work, except mate never thrashed it). It also needed a turbo at 110k caused by sticky vanes digesting themselves into the system due to a clogged up system.

Edited 16 May, 201214 yr by jrw

Mine was a faulty sensor actually! The Made in US one

DPF was at 50% full after 3 1/2 years but recently I'd done a fair few short journeys in the previous months which is why I now have the Petrol vRS so he cleared it anyway.

My typical driving was for work which I get paid mileage for so it was miss daisy for 75% of its life. Changed up before 2k etc.

Maybe a boot after the system is hot is a good compromise! As I understand it the soot get's 'burned off', not thrown out the back. This leaves ash which cannot be removed, so in my head, the less soot the better.

Run on vpower or similar and BG244 also take it up to a ton on private roads for a few miles no problems

Mine was a faulty sensor actually! The Made in US one

DPF was at 50% full after 3 1/2 years but recently I'd done a fair few short journeys in the previous months which is why I now have the Petrol vRS so he cleared it anyway.

My typical driving was for work which I get paid mileage for so it was miss daisy for 75% of its life. Changed up before 2k etc.

Maybe a boot after the system is hot is a good compromise! As I understand it the soot get's 'burned off', not thrown out the back. This leaves ash which cannot be removed, so in my head, the less soot the better.

Very rarely does my Passat get upto 2000rpm, drive gently to and from work 30 miles each way and the DSG changes up early on a light throttle.

When it does a regen the diesel timing is altered so the exhaust gas temperature is raised significantly to burn the soot out of the dpf. Very occasionaly if I switch the car off during regen both cooling fans run flat out for around 10 minutes to cool the increased underbonnet temperatures. It doesn't half smell hot as well, the first time it did it when the car was brand new and was burning off all the waxes etc I was convinced it was going to catch fire and rang VW Asisst. Not had any issues though but do 15k to 20k miles a year in it.

Our two current Fabia's do very little milage and mainly around town, our previous Fabia was a 1.9PD without dpf, we went with petrol this time, partly because of how well the tsi drove, partly becuase no point paying a premuim for deisel on 3k miles a year and partly because of dpf worries.

Cheers

Lee

As JRW is saying, booting any diesel only creates soot for a few seconds as it clears the system. When you boot it again right after, it doesn't produce anymore soot. The amount of soot is worse on the PD engines, the CR engines are cleaner anyway. But it's essential to boot them regularly and always has been wether PD or CR. The dpf will trap nearly all the soot produced and burn it off. It does no harm whatsoever. Incidentally, this seems to be the best way to keep 'ash loading' to the minimum in the dpf. If you don't boot it regularly your dpf will almost certainly have a shorter life, strange though it may seem.

Ardandy, you have a choice regarding soot produced. You can avoid blasting it and have the soot build up in the engine on valves, injectors, pistons and ports, turbo etc etc, decreasing efficiency and causing the engine to produce even more soot, have fewer mpg's etc and the soot will still get passed to the dpf eventually causing more ash. Or, you can keep the engine running sweet, clean and efficient with good performance and minimal soot production and better mpg by excersing the revs and blasting it once a week or so. We are currently bench testing combined DPF Nox Cats on 2 and 3 cylinder diesel engines. This is what we have found to be the case in line with other surveys.

Edited 17 May, 201214 yr by Estate Man

The ash doesn't get ejected, it stays in the filter, hence why they eventually block up and have to be replaced (or of course removed).

When we say blasting it... is doing a motorway run at 70mph enough?

When we say blasting it... is doing a motorway run at 70mph enough?

Yes but in which gear?

Most modern diesels will accelerate from 0 to 70mph on a light throttle without exceeding 2000rpm.

A Spirited run upto 70mph then sit at around 2500rpm maybe better. No need to keep flooring the throttle, just higher rpm and more throttle.

As long as you do decent runs and not all town work you should be fine.

Our Fabia's spend most of their limited mileage around town with the odd run out which is why they are Petrol.

Cheers

Lee

I do mostly motorway driving, around 70%. Would you say 70mph in 5th (2000rpm) for half an hour a week is good enough?

Most DPFs regenerate at a constant speed of over 40mph for approx 20 miles at normal working temperature.

`Blasting diesels out` only clears accumulated soot from valves, piston tops,combustion chambers and the remaining exhaust.

It will be a case of seeing who in your area quotes what price if it is going to be cleaned professionally.

Going to be plenty offering the service pretty soon as more and more owners or second owners try to save having to replace a DPF.

http://www.dpfcleaning.co.uk

'DPF cleans guaranteed for 5,000 miles or 6 months'

Rather send my bank details to a Nigerian Bank,

My name is Billy not Silly, i will stick with my Petrol Engines from now on!!

george

Edited 17 May, 201214 yr by sk4gw