DPF removal issues.

Dav1992

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Hi all,

I had my DPF removed a while ago, as it kept blocking so I went for the cheaper option and just remove it. the guy mapped it but everytime I took the car for a longish drive and put my foot down the engine light would pop up, which to me it meant he didn't do it properly? Also everytime I put the footdown I would see a massive black cloud in the mirrors? I then took the car to a proper company to map it, the guy said the black smoke is probably because its not mapped properly so he did just that but the issues kept coming back, the engine management light would pop up again.

At the same time I started experiencing weird noise coming from the air vents? Almost like a air leak from the engine bay? Every time I put my foot down?

Please, has anyone experienced that sort of issue? Or any ideas? Genuinely I've never had so much issues with any previous car I owned. And any kind of advice or help would be muchly appreciated.

Dav.
 

LostKiwi

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FFS. Removing the DPF winds me up. Why did you not just fix the problem (which is still there which is why you get black smoke).
It sounds like you have a split or leaking intercooler hose. Fixing the problem would have been much cheaper than f**cking about with the DPF.

There was probably nothing wrong with the DPF.
 
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Dav1992

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FFS. Removing the DPF winds me up. Why did you not just fix the problem (which is still there which is why you get black smoke).
It sounds like you have a split or leaking intercooler hose. Fixing the problem would have been much cheaper than f**cking about with the DPF.

There was probably nothing wrong with the DPF.
Well the garage did say it was the dpf. They had to force the regeneration couple of times. I drive hell of a lot in town and do small journeys. Hey, people make mistakes and learn from the mistakes..
 

LostKiwi

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Well the garage did say it was the dpf. They had to force the regeneration couple of times. I drive hell of a lot in town and do small journeys. Hey, people make mistakes and learn from the mistakes..
Sounds like you need a better garage sorry.
Diesels are not suitable for town use. The NOx is toxic and the soot particles are carcinogens. A DPF removes those but will tend to clog unless everything is perfect.
A better choice is petrol for town use. Best of all electric.

This is why EU3 petrol engines are permitted in ULEZ zones but EU5 diesels aren't - the NOx and soot can't be brought down to suitable levels.

In your case the regents were required due to other issues (it was a symptom not the cause). If everything else was working correctly the DPF would likely have been relatively ok.

Removing a DPF makes a vehicle illegal to drive on the road with a potential £1000 fine. It's also an instant MOT fail. If you haven't told your insurance company them you have possibly voided your insurance as it's now a modified vehicle. I bet whoever suggested removing it never mentioned any of that though.
 
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Dav1992

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Sounds like you need a better garage sorry.
Diesels are not suitable for town use. The NOx is toxic and the soot particles are carcinogens. A DPF removes those but will tend to clog unless everything is perfect.
A better choice is petrol for town use. Best of all electric.

This is why EU3 petrol engines are permitted in ULEZ zones but EU5 diesels aren't - the NOx and soot can't be brought down to suitable levels.

In your case the regents were required due to other issues (it was a symptom not the cause). If everything else was working correctly the DPF would likely have been relatively ok.

Removing a DPF makes a vehicle illegal to drive on the road with a potential £1000 fine. It's also an instant MOT fail. If you haven't told your insurance company them you have possibly voided your insurance as it's now a modified vehicle. I bet whoever suggested removing it never mentioned any of that though.
Like I said you learn from mistakes I guess.. I appreciate all the advice though. However I was just hoping someone had the same issue. I do know diesels not good for town use. I used I used travel for work 45 mins everyday so it was perfect. I moved and that wasn't the case anymore.
 

LostKiwi

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Black smoke is excess fuel for air supplied. The usual cause is split intercooler hose, leaking intercooler hose, hole in intercooler.

Given the noise you're hearing I'd be pretty certain that's it.
 
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Dav1992

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That's what I thought it would be a leak somewhere, they checked it and said there was no leaks anyhwere? Unless it's just the garage? They said they will check it tomorrow if dpf has been removed properly? ‍♂️
 

Gazwould

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I wonder what the VED difference is between EU3 petrol and EU5 derv....
 

mioba

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Any circumvention of an error is a bodge job, sorry to say. Fix the issue at hand in a diligent manner.

Many purist on t forum with experience.

Deletes, remaps etc only question the ethics of your garage.
 
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Dav1992

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Is there any recommended garage who specialise in that sort of things and would sort it out in Lincolnshire area? Or around?
 

V6Matty

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If you can travel to Nottingham there is MBCENTRE near the racecourse or Mercserv on Radford Road.
 

ajlsl600

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FFS. Removing the DPF winds me up. Why did you not just fix the problem (which is still there which is why you get black smoke).
It sounds like you have a split or leaking intercooler hose. Fixing the problem would have been much cheaper than f**cking about with the DPF.

There was probably nothing wrong with the DPF.
I absolutely knew u wud be next to comment on this before I scrolled down to see it.
 
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Dav1992

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I'll keep you updated. Honestly, even 7 years ago when I had my astra I never had that many issues with a car. And I service it regularly and looking after it.. so far I've been super unlucky with the E class or maybe I seeked help from wrong garages/people.
 
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Dav1992

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MB Centre aren't interested as the dpf is out and clearly the dpf should be in and I get that, however at this moment of time I can't afford a new DPF as well as coding and labour on top of it.
 


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