Sunday, 24 March 2013

DPF Removal!! (How to Remove A DPF Successfully)


If you came to this page because of fault/trouble codes you retrieved from a diagnostic tool you may find our iPhone/iPad or Android App useful.

Not only does it give you 'Fault Descriptions' but also gives you 
Possible Causes!! 

 Check it out on the App Store or Play Store!! 

DPF's or Diesel Particulate Filters first started appearing on cars around 2005. Ever since people have been searching for ways to effectively remove them. Reasons for this usually are.

  • Poor Fuel Economy
  • Loss Of Power
  • Cost Of Replacing Broken DPF
  • Preventing Breakdowns
DPF (Diesel Particulate Filter)
DPF (Diesel Particulate Filter)
The other thing you may be wondering is it even legal and will my car pass the MOT. Well yes it is legal in the UK at least and your car will still pass its MOT if the DPF looks as though it is still fitted, (It is only a visual check on the MOT) and if your car passes the emissions test with a DPF then it will normally pass without. This is because the MOT emissions test is different to the one used by the government body that tests new cars and sets the road tax fee accordingly. This is the reason the DPF is fitted in the first place.

The trouble is, it is extremely difficult to effectively remove a DPF due to the way the manufacture writes software for the engine ECU. 

Sure you could just remove the internals from the DPF but this will cause the DPF pressure sensor to register a fault and bring the engine management light on. This is because the pressure sensor measures pressure difference across the DPF and can tell if the DPF is missing. Also a side effect of this is that the ECU may try to regenerate the DPF even if it is missing. Wasting fuel and increasing wear on engine components.

So how can you remove the it and prevent further faults with the DPF. Well its a two pronged attack. The first is to remove the DPF from the exhaust and still make it look like its still fitted. This usually involves removing the internals or fitting an empty DPF shell to the exhaust. Some tips for doing this are to cut the DPF open in a inconspicuous location i.e. behind a heat sheild, remove the internals and re-weld the DPF back together. Another option is to buy a product like the one in this link:

MD Automotive

Although that part is for a BMW a quick Google search should yield decent results for you make and model.

The second part is a lot more difficult. You need to remap the ECU software to eliminate ALL aspects of the DPF. This is extremely difficult and you must ensure all references to the DPF are removed. Other wise you will continue to get regenerations, rendering the removal pointless. The other issue is the maufactures don't write software for ECU's in English or a readable computer language, It is written in Hex or Binary code and is just a collection of letters and numbers that are extremely difficult to understand unless you wrote the software.

I often see cars that have been incorrectly remapped to remove the DPF, and I have yet to see a remap that completes the process properly. I'm not saying they don't exist, just i haven't seen one yet. I have how ever found a couple of UK companies that claim to be able to do this:

MD Automotive
The DPF Removal Company

Due to my location it is proving difficult to find companies in other locations. If you know of any reputable companies in your area drop us a comment below!

So there you have it. If you want to remove your DPF, the key is to ensure the guy remapping your car knows how to remove all DPF References 100%.

Have you had any issues removing your DPF or do you know a ECU remapping company that does the job efficiently? Help other people reading this Blog and let them know who they are!

Like this post? Check out these:

1 comment:

  1. DPF Removal in Halifax, West Yorkshire: