What’s a Diesel Particulate Filter (DPF)?

A Diesel Particulate Filter is designed to eradicate diesel particulate matter, or soot, from the exhaust gas emitted by the vehicle.  DPF’s are fitted to most modern diesel engine cars and vans.

Some DPFs are designed to be used only once and will need replacing when they are full. Other Diesel Particulate Filters are intended to burn off the gathered particulates with the use of a catalyst or by running an in-built engine program, when required, that injects extra fuel into the combustion process thus causing the exhaust temperature to increase and reach a level that incinerates the trapped soot in the filter. This is known as regeneration.

How would I know if my DPF is blocked or not working ?

If the DPF is beginning to block the performance of the vehicle begins to suffer resulting in lower fuel efficiency, loss of engine power and eventually complete engine failure.

A block will be indicated on the dashboard of your vehicle by a warning light.

How do they get blocked?

DPFs can block for several reasons, not always the fault of the Diesel Particulate Filter itself. A blocked DPF could be as a result of any of the following;

  • Sensor failure – There are several sensors on the vehicle that gather information such as exhaust pressure and DPF temperature. These sensors help the engine to identify when a block is occurring and an automatic regeneration is necessary.
  • Engine underperforming – If the engine is not working to its maximum efficiency due to an underlying fault, this can cause the filter or regeneration process to underperform.
  • Incorrect fuel/oil – By putting incorrect fuel or oil into the car or van you may present the filter with unexpected particles that the filter membrane may struggle to capture appropriately and these particles may not combust during the regeneration process.

What are the benefits of DPF removal / delete?

With the DPF removed from your vehicle, not only are you eliminating the possibility of the filter becoming blocked resulting in a substantial replacement cost, but you will experience greater fuel economy along with better engine performance from your vehicle. This is because the build-up of exhaust pressure on your engine is much lower and this allows the engine to work under less strain, requiring less power and fuel.

What’s involved in removing the DPF?

Removing the Diesel Particulate Filter from your vehicle can vary from very easy to highly complicated depending on the model. It is essential the DPF is removed from your car, more importantly, we do not simply replace your DPF housing with a straight pipe like the less ethical tuning companies do.

This outdated method will definitely cause problems down the line when new legislation comes in to effect and fail the MOT. We perform the more professional method removing the worn filter from the existing DPF housing.

This way, takes a little longer but it is worth the extra effort. The vehicle will look standard to all external inspections retaining its value in the future.  Once filter is removed and sealed, the final step is to carry out a special DPF specific ECU remap to update the software on the vehicle to recognise that it no longer needs to monitor and attempt to regenerate a Diesel Particulate Filter.

Contact Us

If you are experiencing problems with your DPF Advanced Tuning may be able to eliminate the fault in a matter of hours with a routine and effective procedure.

Call our DPF Removal / DPF Delete team today for free expert advice on 07595 023 239

 Written by Chris Fisher
Advanced Tuning Technical advisor