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#875798 - 18th May 2014 2:30pm dpf removal,anyone done it?
joeblogs Offline
Smartchild

Registered: 8th May 2011
Posts: 399
Loc: bebington
thinking of getting this done the proper way,they cut the dpf open take the insides out and weld it back again,and then update the ecu,anyone done it

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#875805 - 18th May 2014 4:43pm Re: dpf removal,anyone done it? [Re: joeblogs]
Happy Birthday turnip Offline
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Registered: 15th Dec 2011
Posts: 1018
Loc: wirral
I'm fairly certain that there's no 'proper' way to get this done as it's illegal. I would imagine it would show up on an emissions test for the mot if nothing else.

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#875810 - 18th May 2014 5:10pm Re: dpf removal,anyone done it? [Re: turnip]
joeblogs Offline
Smartchild

Registered: 8th May 2011
Posts: 399
Loc: bebington
well after they put it back together they put some software in the ecu to tell it the dpf is not there,so it wont try to do a regeneration,its only soot so will be fine for mot

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#875812 - 18th May 2014 5:58pm Re: dpf removal,anyone done it? [Re: joeblogs]
CVCVCV Offline
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Registered: 4th May 2010
Posts: 1452
Loc: ex Wallasey now Atlanta GA USA

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#875841 - 18th May 2014 8:33pm Re: dpf removal,anyone done it? [Re: joeblogs]
mrhanky Offline
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Registered: 1st Dec 2010
Posts: 1236
Loc: my house
did my saab 9-3, easy peasy. if the front pressure sensor is a hose type you can just try crimping that closed, most ecu's only really needs to see a difference in pressure between the sensors.

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#875843 - 18th May 2014 8:54pm Re: dpf removal,anyone done it? [Re: joeblogs]
venice Offline

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Registered: 21st Jul 2011
Posts: 2748
Loc: Wirral
Doesnt it invalidate insurance though if you did have a smack and it was examined?

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#875844 - 18th May 2014 9:00pm Re: dpf removal,anyone done it? [Re: venice]
mrhanky Offline
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Registered: 1st Dec 2010
Posts: 1236
Loc: my house
i very much doubt it would end up getting checked in the event of an accident?

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#875867 - 18th May 2014 10:32pm Re: dpf removal,anyone done it? [Re: mrhanky]
chriskay Offline
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Registered: 25th Oct 2007
Posts: 4868
Loc: shropshire
Originally Posted By: mrhanky
i very much doubt it would end up getting checked in the event of an accident?


I wouldn't bet on it, the insurance companies will look for any excuse not to pay out.
_________________________
Carpe diem.

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#875870 - 18th May 2014 10:45pm Re: dpf removal,anyone done it? [Re: chriskay]
mrhanky Offline
Forum Addict

Registered: 1st Dec 2010
Posts: 1236
Loc: my house
Originally Posted By: chriskay

I wouldn't bet on it, the insurance companies will look for any excuse not to pay out.


'i didn't know it had been done, i don't even know how to check my oil so how would i know if my car has a dpf or if it's just an empty box'

quite hard for the insurance to prove the current owner had it taken out themselves.

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#875929 - 19th May 2014 10:29am Re: dpf removal,anyone done it? [Re: joeblogs]
StuyMac Offline

Wiki Master

Registered: 24th Nov 2003
Posts: 12002
Loc: Wirralshire
Ive removed the DPF on my last BMW 530d and my current 335d.

The MOT is a visual check - if you have a gutted DPF it appears to be in place - on my current car, its been replaced with a delete pipe and you cant see it due to the undertrays on the car (MOT testers cant remove parts of your car to inspect).

The diesel emissions test is a basic smoke test, and is the same for all diesel cars, so as long as there are no clouds of black smoke you should be fine (mine passed its MOT last month no problems).

Once its been removed it does need to be mapped out, to stop regenerations. I had mine custom mapped, as I also had the EGR removed and deleted, and had the car mapped for performance too.

Car no makes 368bhp and 542ft/lb torque - it also still does 50mpg on a run wink
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#876203 - 20th May 2014 1:56pm Re: dpf removal,anyone done it? [Re: joeblogs]
Gibbo Online   content
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Registered: 27th Dec 2010
Posts: 1787
Loc: Oxton
If a car is maintained properly the DPF shouldn't give you problems.

Yes, they need replacing over time, but so does the clutch, the cat, and various other parts, which work out at fractions of a penny per mile.

I've known people who've had theirs gutted, some with remaps, some without. Some have gone OK, others have had no end of problems with limp mode due to the differential pressure sensor noticing a massive difference in air pressure because of the empty DPF chamber, and various other problems they've not even able to solve and the remapper / DPF gutter has just shrugged their shoulders at.

Just get a new one from CATS2U, it'll probably cost the same in the end.

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#876204 - 20th May 2014 2:14pm Re: dpf removal,anyone done it? [Re: Gibbo]
StuyMac Offline

Wiki Master

Registered: 24th Nov 2003
Posts: 12002
Loc: Wirralshire
Originally Posted By: Gibbo
If a car is maintained properly the DPF shouldn't give you problems.


I disagree.... Short journeys clog them up, and even the best maintained car will have issues if you do a lot of cold starts and short runs.

Cars run rich when cold which produces more soot which clogs the filters. On BMWs they regenerate themselves, but certain criteria need to be met - water needs to be up to full operating temp, exhaust needs to be up to temp, and you need to be doing xxxrpm at xxxmph for the ECU to initiate a regeneration. This involves (on BMWs) adjusting the diesel timing the generate more heat in the exhaust and thus burning off the soot - if you never get the car hot on a good run, then they dont regenerate and they clog.

If you find a reputable remapper, you should have no problems. With a DPF delete / gutted, the software just needs to be modified to remove / alter the pressure sensors so they always show the DPF as clear and doing its job.

I had the 530d for 3 years with a DPF delete and Ive had the 335d for just over a year with the DPF deleted and never had a problem. Not only do you get the extra performance, but you also get more mpg smile
_________________________


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#876230 - 20th May 2014 3:59pm Re: dpf removal,anyone done it? [Re: StuyMac]
Gibbo Online   content
Forum Addict

Registered: 27th Dec 2010
Posts: 1787
Loc: Oxton
Originally Posted By: StuyMac
I disagree.... Short journeys clog them up, and even the best maintained car will have issues if you do a lot of cold starts and short runs.


True, but they'll regenerate and clean. Granted this may happen more often and shorten the lifespan, but that's the downside of owning a modern diesel in the wrong environment.

Even before the DPF came along a diesel used on short journeys will get the EGR valve clogged up way before its time.

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