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Erwin
Member Since: 09 Jul 2013
Location: E.T. Coevorden
Posts: 2
  
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I want to remove the DPF in my Disco 4 SDV6.
I use the car only for country driving and I have had quite some trouble with the DPF in the warranty period.
Now the car is out of warranty and I want the DPF problem solved.
Does anyone know of a DPF removal company for the D4?
I have had contact with a company the do a lot of tuning, also on the D4. He told me he needs a computer from a Disco 4 SDV6 that has no DPF fitted to see where he has to change the software.
Is anyone around with a 2010 D4 SDV6 without DPF that has access to an Autologic computer who can program a new computer for me?
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 7th Aug 2013 4:07 pm |
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Ent
Member Since: 12 Oct 2007
Location: In the cack
Posts: 6488
  
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I'm sure you can edit the CCF to delete the DPF from the equation, you only need to source a piece of exhaust pipe to fill the gap. Prospeed are doing mine next month. Club Exped trailer
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| 7th Aug 2013 6:42 pm |
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Erwin
Member Since: 09 Jul 2013
Location: E.T. Coevorden
Posts: 2
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It can't be changed in the CCF.
It has to be changed in the engine management ECU. And also the pressure sensors have to be removed from the pipe.
You can buy a piece of pipe that comes in the place of the DPF
Who is Prospeed? Can they do it?
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| 7th Aug 2013 8:20 pm |
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prospeed
Site Sponsor
Member Since: 28 Sep 2009
Location: York
Posts: 143
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Hi Erwin,
We are a specialist Automotive Engineering company based in York, I think is the shortest description I can give you!
Yes, we can do it. It does need to be programmed out in the ECU, and the pressure and temp sensors actually have to be put back in afterwards. Also, we would need to do a forced regen cycle before we started.
We have successfully done a few now, mostly with re-maps at the same time. Some with full exhausts including race cats, which we make in house, and some with just a replacement DPF pipe. We have built a custom intercooler and rad for one D4 as well, which ended up being TDV8 quick and then some!
If you would like to talk it through, please don't hesitate to give us a ring on 01904 728112.
Many thanks,
Olly
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| 7th Aug 2013 9:58 pm |
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colin6307
Member Since: 17 Apr 2010
Location: croydon
Posts: 246
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What about the mot
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| 8th Aug 2013 6:39 am |
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Ent
Member Since: 12 Oct 2007
Location: In the cack
Posts: 6488
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You could order a D4 without the DPF 2010 so I don't think the 3l engine has a problem meeting emission standards. Club Exped trailer
Club Timed Climate
Club Flappy paddle steering wheel
Club 300bhp
Club Prospeed test pilot/lab rat
Club National Luna Stella conditioner
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| 8th Aug 2013 6:01 pm |
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countrywide
Member Since: 16 Sep 2007
Location: UK
Posts: 6019
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DPF is not part of the MOT and it's only a smoke test, the same as a D3 gets, so it should be fine.
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| 8th Aug 2013 6:14 pm |
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colin6307
Member Since: 17 Apr 2010
Location: croydon
Posts: 246
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It should be fine, not a very positive statement, mot examiner tells me it would fail, as there are new tests
now,
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| 9th Aug 2013 7:38 am |
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prospeed
Site Sponsor
Member Since: 28 Sep 2009
Location: York
Posts: 143
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Hello all,
Just to clarify, in short, it would pass the MOT.
You are all correct in what you're saying to be honest, but I'll try to sum up why it would pass below:
A Disco 4 without the DPF will pass the diesel smoke test, no problem, and emissions in general, no problem. The levels set for the MOT are much higher than those set for the Euro emissions for manufacturing the vehicle.
But, there are new tests in the MOT for DPF, but they are based around establishing whether the vehicle has a DPF filter fitted if it should have, not whether it works or not. That's the crux of it. When we delete the DPF on a Discovery, or any car for that matter, we don't actually delete it in the ECU, we just freeze it at it's current state in the ECU. That's why it's important to do a regen cycle to get the figures in the ECU down as low as possible, because that's where it's going to stay for the rest of its life. So, the ECU carries on functioning exactly as normal, but with a set of DPF readings which just stay where they are. To do that, it needs all the temp and flow sensors to be left in the exhaust so it can see them, because it wants to see them. Because of that, on the exhaust you can either take the old DPF pipe and remove (read smash up) the filter inside. Or build a new section as we have, with bosses to mount the sensors back in.
The new test to establish that the DPF is fitted are based around visually looking for it and its sensors in the exhaust, and a code read of the ECU / MIL light check to see that it is functioning from an ECU perspective. Both of which would be passed with flying colours.
Hope that clarifies it a little bit.
Thanks,
Olly
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| 9th Aug 2013 9:14 am |
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colin6307
Member Since: 17 Apr 2010
Location: croydon
Posts: 246
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Olly
Excellent reply.
Now i had a Nissan Navara, on 58 plate, nothing but trouble with dpf, took of dpf and bashed a hole through
the middle, approx same size as pipe, no further trouble for about 5000 miles, then started to play up, got
rid of the vehicle so i don't know of the outcome
I would like to get rid of my dpf, i have a 12 reg D4, but who do you trust, then their is the warranty question
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| 9th Aug 2013 9:36 am |
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prospeed
Site Sponsor
Member Since: 28 Sep 2009
Location: York
Posts: 143
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Hi Colin,
Both excellent questions!
The warranty question is very difficult / impossible to get around. The only variable is how much or how little your local dealer wants to support you / be an  if you know what I mean. Having said that it's actually quite unlikely that the dealer will ever know - externally everything looks like it's there, and as far as the ECU concerned, everything is normal!
Who do you trust is another difficult one - whereabouts are you based? There are a few good people around the country who can do it. Or if you've got a local specialist who can do the regen cycle and removal of the DPF physically, you could send your ECU to us and we can do ECU side.
It is worth saying that if you have a DPF problem now, it does need fixing before you remove the DPF. Basically, depending on the problem it can persist even after the DPF has gone because the ECU is still effectively operating as if it were there. Once it is fixed, and the DPF is gone though, you'll not have problems again.
Thanks,
Olly
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| 9th Aug 2013 10:32 am |
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countrywide
Member Since: 16 Sep 2007
Location: UK
Posts: 6019
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As I understand it, the DPF it is not a failure if it is removed even if it was there from factory. The MOT checks for equipment "fitted at manufacture" for emissions are only part of the full emission test and the diesels don't have that only the smoke test.
Have I got this wrong as I want to remove it from a van we have
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| 9th Aug 2013 12:37 pm |
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prospeed
Site Sponsor
Member Since: 28 Sep 2009
Location: York
Posts: 143
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Hi countrywide,
Over and above the emissions / smoke test for diesel, there is now a visual check for emissions related equipment fitted at manufacture as well.
However, as I explained, it's still quite easy to get around it without causing any problems.
Unfortunately for those of us who are accustomed to modifying our cars, the MOT test is only going to get more stringent, but it is for us to figure out how to bend the manufacturer's and government's rules!!
We've been MOTing WRC rally cars with 900nm of torque from a 2ltr engine, 102 octane fuel, 3 bar of boost, a cat which really doesn't do anything for emissions, a straight through exhaust and no retracting seatbelts for years! Most of the time, the MOT tester can't even drive the thing onto the ramp!!!
For us it's one of life's little games we have to play!
Olly
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| 9th Aug 2013 2:31 pm |
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countrywide
Member Since: 16 Sep 2007
Location: UK
Posts: 6019
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So if the model was available without a DPF would they be likely to fail it, if we took it off completely. Apparently this van is easier to remove as you can program the ECU to tell it there is no DPF option fitted so you can remove everything.
Had to force a regen the other day as it over 90% full, it's back to 18% now. Bit worrying when you do it and the car starts to rev to 3,500 for 10 minutes and the DPF sensor says 620 degrees  . The ground underneath was quite hot.
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| 9th Aug 2013 2:50 pm |
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prospeed
Site Sponsor
Member Since: 28 Sep 2009
Location: York
Posts: 143
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In theory, if the model was available without a DPF, you should be able to remove it completely, and they won't fail it. Although their system may argue that your number plate / chassis number says there should be one fitted. I think it would depend on how pedantic your MOT tester was being that day.
Force regen is a bit exciting that way - lots of revs (for a diesel) and lots and lots of heat. I always prefer the driving type forced regens - at least that way you get some cool airflow over the outside of the DPF!
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| 9th Aug 2013 3:05 pm |
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