DPF - Replacement or Removal/Remap?

[Jonathan Carling]

The diesel particulate filter light appeared on my dashboard a week ago, been in "limp mode" ever since even after blasting down a dual-carriage way for 30 minutes (as per recommendations) but no luck. Took it to my mate's garage where they've tried flushing it and a re-gen but it's still failing to do so.

I've read mixed views on whether or not to replace the DPF and re-gen or to instead completely remove it and get the ECU remapped - wondering if any has opinion/recommendations?

If I replace it, is it likely to happen again soon (it sounds like a common fault)?

If I remove it, will it still pass an MOT? Will it harm any other part in the long run?

Thanks in advance!

 

[SootySport]

It will fail the MOT (officially) without a DPF. This will depend on how pally you are with the tester guy .
This is the main reason I ditched diesel cars a couple of years ago, nothing but trouble and now demonised by the government.
DPF equipped cars do not like short journeys and even if it is the latest type of DPF which uses extra fuel to burn of the soot, the life expectancy is shorter than a taxi that is running all day doing mega mileage.

 

[lgooch]

How many miles you on ?


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[Jonathan Carling]

82,000 - I don't do as many miles as I used to which has probably contributed to the problem...

 

[Retroman]

Here's an example (which I appreciate may not be in your neck of the woods) of a specialist firm in my area who also offer a manual (not computer) DPF cleaning service. Keeps the car MOT legal and doesn't require a "remap" with all the implications (insurance and otherwise) that that can entail.
http://www.ebay.co.uk/itm/Audi-A3-2....0+TDI&hash=item3d0fa949e7:g:ji8AAOSwL7VWpf-G

 

[ab1702]

The diesel particulate filter light appeared on my dashboard a week ago, been in "limp mode" ever since even after blasting down a dual-carriage way for 30 minutes (as per recommendations) but no luck. Took it to my mate's garage where they've tried flushing it and a re-gen but it's still failing to do so.

I've read mixed views on whether or not to replace the DPF and re-gen or to instead completely remove it and get the ECU remapped - wondering if any has opinion/recommendations?

If I replace it, is it likely to happen again soon (it sounds like a common fault)?

If I remove it, will it still pass an MOT? Will it harm any other part in the long run?

Thanks in advance!

Dpf's aren't something that become a common fault they just get clogged up by drivers not knowing how they have to drive their vehicle in such a way for it to not get blocked.
The more you drive around doing low revs so like 1000-1500 rpm the more it is going to get clogged up as these revs don't give a high enough temperature to burn off the soot. The more regular you drive at say 2000 rpm or above then you're normally fine as it burns the soot off.

The problems you now have is that if you keep a dpf even if it's a new one then it's likely to block up again if your driving habits are the same as before. Or on the other hand if you have it removed and remapped as said above then you've got to find a tester that is willing to mot it for you without the dpf.

 

[rbdazza]

i'm sure the brochure doesnt say dont buy this car unless you do 40k miles a year on a motorway. i do mixed driving, sometimes i can go weeks without touching a motorway, other times i can do thousands of miles over a couple of weeks. quite frankly how and where i drive is up to me and i shouldnt have to buy something that runs on the evils **** just to accomplish that.

with all that said, i have opted to have mine removed in anticipation of it going wrong. i don;t like the idea of diesel being dumped in to my engine oil and i don't like the idea of an expensive fix should it get over clogged. had the EGR done with a stage 1 map for good measure.

 

[rbdazza]

p.s. i had mine gutted, not replaced with a pip, which covers the current visual MOT check

 

[Nhutchie]

Speak to angel tuning in banbury... Had 12 months of grief with mine... 3 master techs and 2 specialists couldnt resolve it.... Angel sorted it in 2 days... Speak to tom.

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[Marek196c]

Dpf's aren't something that become a common fault they just get clogged up by drivers not knowing how they have to drive their vehicle in such a way for it to not get blocked.
The more you drive around doing low revs so like 1000-1500 rpm the more it is going to get clogged up as these revs don't give a high enough temperature to burn off the soot. The more regular you drive at say 2000 rpm or above then you're normally fine as it burns the soot off.

The problems you now have is that if you keep a dpf even if it's a new one then it's likely to block up again if your driving habits are the same as before. Or on the other hand if you have it removed and remapped as said above then you've got to find a tester that is willing to mot it for you without the dpf.

Do you know that dpf also if in minor quantity but putting the diesel into oil (not everyone but major of them using engine oil to get temp faster)?
However is still better to cut it off for simple reason thing that u don't got can't be broken.

 

[Gazwould]

Diesels are about economy , driving above 2000 rpm all the time isn't economical .

What a stupid flawed system the dpf is.

 

[oldoiler]

The diesel particulate filter light appeared on my dashboard a week ago, been in "limp mode" ever since even after blasting down a dual-carriage way for 30 minutes (as per recommendations) but no luck. Took it to my mate's garage where they've tried flushing it and a re-gen but it's still failing to do so.

I've read mixed views on whether or not to replace the DPF and re-gen or to instead completely remove it and get the ECU remapped - wondering if any has opinion/recommendations?

If I replace it, is it likely to happen again soon (it sounds like a common fault)?

If I remove it, will it still pass an MOT? Will it harm any other part in the long run?

Thanks in advance!

I drive mine like a petrol , don't let it labour and DMF should not be a problem too. My miles are less than 8k now. What year is your car, early dpf build were a after thought newer designs are better


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