Diesel particulate filter DPF

Discussion in 'Motorhome Chat' started by jezport, Jan 26, 2014.

?

Have you had DPF problems with your motorhome

  1. Yes

    1 vote(s)
    2.9%
  2. No

    33 vote(s)
    97.1%
  1. jezport

    jezport Funster

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    I have heard lots of people with DPF problems on cars. Dealers say that DPFs are not happy if used for lots of short trips or only slow driving.
    Our motorhomes mainly do longer and faster trips than the sort of trips that dealers say clogs DPFs. So if they are correct our vans should never have DPF problems.
    so as a matter of interest please answer the questions in this poll.

    Please only vote if your van has a DPF
     
    Last edited: Jan 26, 2014
  2. DuxDeluxe

    DuxDeluxe Funster Life Member

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    No poll, but you are right........ Only the Euro 5 ones have a DPF as far as I know
     
  3. jezport

    jezport Funster

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    Poll should be there now
     
  4. ROB1CHELSEA1

    ROB1CHELSEA1 Funster

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    We had one fitted to our first motorhome for £3000 and it failed the emissions test every time :RollEyes: sold the van in the end and the filter now sits in my shed.
     
  5. sdc77

    sdc77 Funster

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    Our last van was a vw crafter.. Lots of horror stories about their DPF filters... But it's almost always when they are used for multi drop work as couriers.. The filter never gets the chance to regenerate. We never had a problem with it.
     
  6. jezport

    jezport Funster

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    Was your DPF a manufacturers original, or an aftermarket one for LEZ
     
  7. pappajohn

    pappajohn Funster Life Member

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    DPF should auto-regenerate when required at motorway speeds.

    You know when its regenerating.....much hotter exhaust (up to maybe 700c at the filter from normal 230c/250c), clicks and cracks at standstill and burning smell.

    Constantly running at low speeds and stop start driving will cause it to clog..
     
  8. ROB1CHELSEA1

    ROB1CHELSEA1 Funster

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    it was an after market one for LEZ, but the old engine just didn't like the new piece of kit.
     
  9. daveandsan

    daveandsan Funster

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    Ive got a 2010 Hobby on a 2.4 Ford Transit which i bought private last July.
    No sooner had got it home and the warning light came on. Had to take it for service and mot and they reset the warning light, told me it was the DPF and if i had any more problems to take it to the Main Ford Dealer.
    2 weeks later warning light back on again, took it to main dealer in Wolverhampton and when i went to collect it they said there was nothing wrong with the DPF and that it was a software problem that they are looking into. I was told that when i turn the ignition on i should wait for the warning lights to go out before i crank the engine. Touch wood i havn't had the warning light come back on since.
    I did have a print out off Ford with all this on but i am afraid it is in the Motorhome in storage or i would have put a copy of it on this thread.

    Dave. :Smile:
     
  10. buttons

    buttons Funster

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    My last VW T5 had a DPF it only brought the warning light up on two occasions in 4 years. Never a problem just an indication that it needs a run to regenerate the filter. Five mins on the motorway and it is back to normal.:thumb:
     
  11. Phill D

    Phill D

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  12. Phill D

    Phill D

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    this is also useful info. the AA suggest that 10 minutes at constant speed over 40 mph should initiate a regeneration.

    extract from AA web site


    Regeneration is either passive or active
    Passive regeneration
    Passive regeneration takes place automatically on motorway-type runs when the exhaust temperature is high. Because many cars don't get this sort of use car manufacturers have to design-in 'active' regeneration where the engine management computer (ECU) takes control of the process.

    Active regeneration
    When the soot loading in the filter reaches a set limit (about 45%) the ECU will initiate post combustion fuel injection to increase the exhaust temperature and trigger regeneration. If the journey is a bit stop/start or you take your foot off the accelerator while the regeneration is in progress, it may not complete and the warning light will come on to show that the filter is partially blocked.

    It should be possible to start a complete regeneration and clear the warning light by driving for 10 minutes or so at speeds greater than 40mph.

    If the regeneration is unsuccessful the extra fuel injected will not burn and will drain into the sump. Oil quality will deteriorate as a result of this and the level will rise. It is important that you check that the oil level does not increase above the maximum level on the dipstick as diesel engines can run on excess engine oil – often to the point of destruction.

    If you ignore the warning light and keep driving in a relatively slow, stop/start pattern, soot loading will continue to build up until around 75% when you can expect to see other dashboard warning lights come on too. At this point driving at speed alone will not be enough and you will have to take the car to a dealer for regeneration.
     
  13. Serendipitous

    Serendipitous Funster

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    MH doesn't have a DPF hence no poll. However had a DPF on cars for last 2 years done lots of 5mile journeys interspersed with longer runs. Touch wood, no DPF problems to date.

    Think it needs a bit of common sense applied, if you have done a few short trips then think about going for a run. Either a decent distance/high speed run.

    Maybe I've been fortunate in needing to do a longer journey now and again. :RollEyes: ah well.
     
  14. pappajohn

    pappajohn Funster Life Member

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    extract from AA web site


    Regeneration is either passive or active


    the AA often get things wrong but on this occasion they seem to have it correct :thumb:
     
  15. jezport

    jezport Funster

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    The problems become worse when forced regeneration is interrupted a few times. Forced regeneration causes diesel to end up in the engine oil. Sensors and the ecu should detect oil thinned by diesel and light the service warning message. If ignored when you get the oil and diesel to a high enough level in the sump the engine can start running on the sump contents and runs on until it destroys itself. It is known as diesel engine runaway.
    So always watch your oil level isn't rising too high due to dilution from diesel
    http://en.m.wikipedia.org/wiki/Diesel_engine_runaway
     
  16. aba

    aba

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    at work we are getting dpf problems in every couple of weeks
    we only use full synthetic low ash oils in services of vehicles with dpf's but it seems around here the choice fuel is cheap supermarket diesel which may contain slightly more bio diesel in than most manufacturers 5% tolerance level.
    modern diesel engines are pumping out far more power than the equivalent of 10 years ago and are cleaner than ever but need clean fuel to work correctly.
     
  17. pappajohn

    pappajohn Funster Life Member

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    5% is the legal, and obligatory, maximum (B5) unless it is B30 which is a specialist fuel.


    Biodiesel blends

    Biodiesel is being produced in three main blends: B5, the five per cent mix with diesel, B30, the 30 per cent mix, and B100, which is pure biodiesel, containing no 'fossil fuel' diesel. B5 is already being retailed on many UK filling station forecourts, but B30 is a more specialist fuel and is not as widely available. Whichever blend, the biodiesel should meet the standards of BS14214
     
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  18. DuxDeluxe

    DuxDeluxe Funster Life Member

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    Hi, it has changed slightly. 7% max in the current EN590 spec....
     
  19. lou020

    lou020 Funster

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    We cut and chisel out the DPF on all our trucks due to loss of turbo boost, makes no difference to emissions at mot time,
    Even vosa man says they are a waste of time.
    aftermarket truck exhaust costs £3600. volvo truck exhaust in excess of £5000
     
  20. Allanm

    Allanm Funster

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    I think these are now going to checked at MOT time. If your vehicle was originally fitted with one to gain its emissions status, then it will fail if it's missing.
    And, as Pappajohn says, you can tell when they have regenerated. Mrs A has one on her car, and just after regeneration it smells like something has died in the engine bay!
    Allan
     
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