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Thread: DPF Cleaning? Bonfire? Who knows?

  1. #1
    Regular Member parapaul's Avatar
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    Question DPF Cleaning? Bonfire? Who knows?

    I know when my DPF starts to regenerate, it's happened plenty of times basically my consumption drops to about that of a space shuttle, and the exhaust sounds like it's had holes drilled in it.

    It normally happens on the motorway as that's where I do probably half of my driving, so it's no hassle. However, it happened this week while I was driving around town, and it startled me to say the least!

    I stopped at the shops not long after the cycle had started, and on getting out of the car, noticed a very strong smell of burning. Fair enough, I thought, I knew the DPF was cooking. So I finished what I was doing, got back in the car, and drove off. Sure enough, as soon as the engine reached temperature again, the DPF regen started again - only with a not-so-subtle difference...

    Now, bearing in mind that I clearly have a DPF fitted, and its sole purpose (by definition) is to REMOVE crud from the exhaust, I was somewhat worried to see clouds of blue/white smoke - NOT black diesel fumes - billowing out of my exhaust every time I put my foot on the throttle I did stop at one point, walk around the car, and it smelt like a bonfire around the back. No smoke at idle, but clouds and clouds of the stuff under any revs.

    But hey ho, 20 minutes later, the regen finishes, the car goes back to normal and not a hint of smoke. I've never seen it before on my car - anyone got any good ideas? Basically, is it OK, and why has it happened this time?

    Thanks

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    Administrator Big-Pete's Avatar
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    Vehicle : Audi Q7

    Trim : S-Line Plus 245

    Engine : 3.0 TDV6

    Year : 2013

    Mileage : 3023

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    I've only ever experienced one dpf burn off in mine, But it happend just as i was about to park in the dealers car park... Scared the crap out of me, all the white smoke and burning smell.. got some funny looks aswell from potential new car customers looking at the cars on show...

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    Regular Member John35's Avatar
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    Still never seen mine do it.....

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    Well that's progress isn't it! You replace one nuisance with another one! LOL

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    Ex Vec-C Admin & Founder Bainie's Avatar
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    I have one in the Leon, and have never noticed it doing it`s stuff yet, though I know it has, because if it hadn`t I would have had the dreaded light on by now . It does amaze me that with one fitted there is no smoke from a deisel ...

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    Administrator Big-Pete's Avatar
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    Vehicle : Audi Q7

    Trim : S-Line Plus 245

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    Its not nuisance, But im sure you'll see a lot of red arrow pilots using DPF equipped cars...

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    Full Member Big Sig's Avatar
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    Pete, has yours actually done enough miles to need a regen????
    Now I need a turbo to keep up!

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    The DPFs are basically not very good (just like EGRs).They were supposed to function correctly with the original software,but now the software has been altered to increase the frequency of regeneration,which means that you burn more fuel,which means that the car is less efficient and more polluting,which kind of defeats the object in the first place.

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    Administrator Big-Pete's Avatar
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    Vehicle : Audi Q7

    Trim : S-Line Plus 245

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    Hi Sean, Well i thought it strange that it was doing the DPF burn at the time because it had only done around 500 miles, but the service manager who bought the parts out to me said it was the dpf cylcle and it was probably doing the regen based on time and not miles ?? No idea if he was having me on or not.. buts its not done it since

    Ps: I pick the new wheels up on Sunday....

  10. #10
    Full Member Big Sig's Avatar
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    OOO nice Pete, Don't forget the pics Wonder if its based on time of the engine running too then ??????
    Now I need a turbo to keep up!

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