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Thread: DPF saturation

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    Regular Member pompey-pimp's Avatar
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    Default DPF saturation

    I've just checked my DPF saturation level and it is at 98%

    I've tried a forced regen but get the message saying that the DPF regen failed.

    any ideas how to do it without going to the stealers?

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    Regular Member byebyeitsagsi's Avatar
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    Post in the correct section?

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    Regular Member Ben50n's Avatar
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    Wouldnt taking it out for a good hard run, geting the dpf hot regenerate it?

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    Regular Member DAVIDD88's Avatar
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    Yeah take it out a motorway run in 4th gear at 60 mph maybe will regen

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    Regular Member barney490's Avatar
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    Quote Originally Posted by Ben50n View Post
    Wouldnt taking it out for a good hard run, geting the dpf hot regenerate it?
    Sadly no. Once a DPF has tried to regen three times and been interrupted before the cycle completes on all attempts, it won't attempt again and needs a forced regen, which as i understand it can only be completed with tech2, i don't think other devices such as the unmentionable op-xxx can do it.
    Perhaps though taking it off and cleaning through with alloy wheel cleaner and a pressure hose will dislodge enough gunk to fool the car into seeing less saturation and allow a normal regen to take place. Always allow a regen to complete and never switch off when one is in progress if you can help it.

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    Regular Member pompey-pimp's Avatar
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    I'll try it tomorrow evening when the wife gets home from work. I only took it for a good blast a month ago and it seems a bit weird that it's full again.

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    Regular Member pompey-pimp's Avatar
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    Quote Originally Posted by barney490 View Post
    Sadly no. Once a DPF has tried to regen three times and been interrupted before the cycle completes on all attempts, it won't attempt again and needs a forced regen, which as i understand it can only be completed with tech2, i don't think other devices such as the unmentionable op-xxx can do it.
    Perhaps though taking it off and cleaning through with alloy wheel cleaner and a pressure hose will dislodge enough gunk to fool the car into seeing less saturation and allow a normal regen to take place. Always allow a regen to complete and never switch off when one is in progress if you can help it.
    Where abouts are they located on the car? Easy to take off and clean?

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    Regular Member barney490's Avatar
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    Quote Originally Posted by pompey-pimp View Post
    I'll try it tomorrow evening when the wife gets home from work. I only took it for a good blast a month ago and it seems a bit weird that it's full again.
    Again, it doesn't quite work that way, you can blast it up and down for miles, but a regen only takes place once certain criteria is met, engine temp, saturation levels, pressure differential in the DPF and miles driven. for example, it a regen has happened lets say 50 miles ago, blasting it up and down won't start another regen. They tend to regen anywhere between 650 and 1000 after the last successful regen, just something us DPF equipped cars have to look out for. Having said that, try a hot run, make sure the car is up to temp and run around 2500 to 3000 rpm if you can for a good few motorway miles, it might work.

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    Regular Member barney490's Avatar
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    Quote Originally Posted by pompey-pimp View Post
    Where abouts are they located on the car? Easy to take off and clean?

    Underneath the drivers footwell on the exhaust, as i recall three bolt flange each end, remove the pressure hoses and it's off. There have been threads about cleaning, just be carefull not to blast too close with a pressure cleaner, the insides are quite delicate. My local SAAB dealer told me about cleaning with alloy wheel cleaner, 5ltre tin from the factors.

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    How do you check the saturation level?

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