DAF LF... DPF Regeneration Issues!!

[Dav_s]

One of the trucks I run is a 2015 DAF LF55 220bhp. I've had it from new, and it's only covered 42,000 miles.
However, since almost day one we've had problems with the DPF. The filter has been changed twice by DAF, as well as other bits and pieces, but it is still regenerating far too often and for far too long.

So far DAF Heathrow's answer has been "take it on the motorway every weekend for a long run". Unfortunately that's not something my business requires of the truck, nor is it something we do with the other same spec trucks, and they have zero DPF issues!

Has anyone encountered similar problems? What is the solution? Faulty EGR valve? I will be taking it to DAF tomorrow for them to investigate.
It's driving me nuts as all these regenerations are impacting our day to day business. Massive headache.

[fttm]

With DPF , Adblue, EGR etc I'm fairly certain through my own suffering that some trucks work and some do not , no easy answer really but the dealer has a valid point regards blasting the soot out down a motorway once a week , well worth trying imho .

[truck71]

I assume OP you're doing very short journeys around the airport? If so the engines on these vehicles don't respond well - I work airside and all the Renaults/ Ivecos have the same issue due to the nature of the work. The MAN's don't but they're a different gravy when it comes to engineering quality.

[Dav_s]

Thanks for the reply.

We tried the motorway blast yesterday and the soot level kept going up and up! Later in the day it started coming down itself, but then jumped from 10% to 80% literally in the blink of an eye, and also at this point the pickup became very sluggish.

After this it did an hour long stationary regeneration (smoky and smelly), and when we left work last night the soot level was at zero.

Let's see what it decides to do today!

[Dav_s]

truck71 said:

I assume OP you're doing very short journeys around the airport? If so the engines on these vehicles don't respond well - I work airside and all the Renaults/ Ivecos have the same issue due to the nature of the work. The MAN's don't but they're a different gravy when it comes to engineering quality.

Yes lots of town driving mainly. It seems to be just this one particular vehicle of ours that's got these issues though. That's what makes it so frustrating.

I didn't realise the Iveco's had a DPF. Thought they relied on Ad Blue alone. Will add them to my list of trucks to avoid buying!!

[truck71]

Dav_s said:

truck71 said:

I assume OP you're doing very short journeys around the airport? If so the engines on these vehicles don't respond well - I work airside and all the Renaults/ Ivecos have the same issue due to the nature of the work. The MAN's don't but they're a different gravy when it comes to engineering quality.

Yes lots of town driving mainly. It seems to be just this one particular vehicle of ours that's got these issues though. That's what makes it so frustrating.

I didn't realise the Iveco's had a DPF. Thought they relied on Ad Blue alone. Will add them to my list of trucks to avoid buying!!

Lots of reasons not to buy an Iveco- they're truly agricultural to drive not to mention poor materials.

[Mindy99]

All new truck diesels have dpf or they don't meet euro6 emission standard. Iveco 6litre just doesnt have egr but you still need regen its dpf, they're just marketing that, but they still need regens or else how do they oxidize the soot in dpf. MAN are no different than other marques in regards egr and certainly german engineering isnt always ace, ask VW. ohh and by the way don't they own MAN to some degree. The issue is how much egr fraction you have at different rpm and loads. If too much fraction at too low an rpm or load then not enough heat is in system to help passively oxidize soot in dpf.

By the way you still got you daf lf suggest you pay a visit to your dealership from what I've heard some big changes a foot in regards soot/regens/software.

[Dav_s]

Thanks for the reply. I took to social media in the end and started making noise about my truck and its issues, and promptly enough the DAF aftersales manager for London and the SE got in touch. He was excellent and they replaced pretty much the whole DPF system bit by bit. The thing that made all the difference (no more DPF problems at all since) was a new EGR valve.

[bearman68]

Interesting - clearly you need to remove the EGR and DPF at the same time.

http://www.bbc.co.uk/news/uk-41761864