At the moment a lot of people are choosing to remove the DPF from their diesel cars for one simple reason – cost. A new DPF or Diesel Particulate Filter can cost in the region of £1,500 and after fitting there is no guarantee that the new unit will last any amount of time. This is especially true if you consider that a slight fault with the car may be causing these expensive units to fail prematurely. It is for this reason that we carry out full diagnostic and visual checks when we perform DPF removal on any car. The most common problem we see is that the car has developed a small split in the charge air pipes which causes the car to run richer than normal and therefore smoke, clogging the DPF prematurely. We also see a lot of EGR failures causing problems as they stick open causing an overwhelming amount of smoke for the DPF. These types of problems have subsided quite a bit and can be picked up more easily with the introduction of lambda probes in diesel exhausts and the newer Bosch and Siemens management systems, however can still cause issues.
Once you have booked and delivered your car into one of our fitting centres around the UK we can then start the DPF removal process. First of all the car goes under a full diagnostic and visual check to search for problems that may cause issues after the DPF removal is complete. Once satisfactory, we will then start to remove the troublesome DPF from the exhaust system. This can take 2-5 hours depending on the car, on some of the new Audi A4, A5 and BMW 330D models this is a notoriously lengthy process. Once the DPF has been removed the canister is emptied and put back on the car. If a catalytic converter is fitted to the car we advise that you leave this in place, sometimes they are fitted in the same canister.
Once the DPF has been removed we can then start modifying the ECU software which controls your engine. We manually search for the code which enables or disables the DPF functions. A lot of the time this is done by official Bosch and Siemens byte switches unlike a lot of other companies. Whilst we are doing this, 99% of the time our customers choose to have a remap. This is completely safe as our remaps are custom developed in-house on our own dyno and once complete we log the car to make sure that all temperatures and pressures are not exceeding pre determined levels. To see what exactly a remap can do, read about our BMW 330D DPF Removal Project Car.
Below you can see a screenshot of one of our performance remaps in development:
Most of the time, the ECU can be modified through the OBD socket inside the car, however the newer 2009 onwards vehicles need the ECU removing so that we can connect to it on the bench. We have done 100′s of ECU’s this way now and can remove, open and modify it without leaving a trace. Here you can see the ECU being opened and connected on a VW Amarok 2.0 TDI.
Once open, we carefully connect to the PCB inside the ECU. One advantage of modifying the ECU in this way is that it does not increment the flash counter and therefore will look like it hasn’t been touched from a programming perspective.
We spend many hours researching and developing to bring you the latest DPF removal solutions. We can remove the DPF on cars as new as 2012 and 2013.