Diesel Particulate Filters DPF TopGear Stockport 0161 4948343

What is a Diesel Particulate Filter / DPF ?

A diesel particulate filter sometimes referred to as a DPF Unlike a Catalytic Converter, a DPF is not a flow through device and works by forcing the gasses to flow through the filter.

As the channels of the filter are blocked as alternate ends, the gasses are forced to flow through the cell walls in order to exit the filter.

As the cell walls are porous, the gasses are allowed to pass through, but the particulate matter is deposited on the cell walls.This ensures that only the clean exhaust gasses can exit, and the particulate matter is trapped in the filter.

Why Do Cars Have DPF's

With changes to the car emissions legislation, the 'Euro 5' standards will make diesel particulate filters a commonplace in diesel car exhausts as catalytic converters are in petrol cars.

DPFs need to be regularly maintained to prevent a build up of soot in the filter. Effectively they are a ‘soot trap’, so in order to prevent it becoming blocked and affecting the running of the vehicle, it has to be cleaned.
This is done with either the use of passive regeneration or active regeneration. A warning light n the dash will warn the vehicle owner is the DPF is becoming blocked and regeneration is needed

Passive Regeneration

Passive Regeneration - occurs on long journeys when the exhaust temperature is high and the soot burns off naturally. For vehicles which unfortunately don't get this kind of use, Active Regeneration is needed.

Active Regeneration

Active Regeneration - occurs when the level of soot in the filter reaches around 45%. The ECU makes small adjustments to the fuel injection timing and increases the exhaust gas temperature. This increases the exhaust temperature which then initiates the regeneration process, burning away the soot trapped in the DPF.

Fuel additive to aid the regeneration

Some types of vehicle (especially Citroen and Peugeot models) use a fuel additive to aid the regeneration process. The fuel additive is added to the fuel tank every time the vehicle is filled with fuel. It is common in vehicles where there isn't enough room to locate the DPF close to the engine where the exhaust gasses are hottest. The fuel additive lowers the temperature at which the soot particles trapped in the filter ignite and burn off. This allows regeneration to take place at a lower temperature than normal.

The most common type of DPF features an integrated oxidising catalytic converter and is located very close to the engine where exhaust gases will still be relatively hot so that passive regeneration is possible.There's not always space close to the engine though so some manufacturers use a different type of DPF which relies on a fuel additive to lower the ignition temperature of the soot particles so that the DPF can be located further from the engine.

The additive is stored in a separate tank and is automatically mixed with the fuel whenever you fill up. Tiny quantities are required though so a litre of additive should treat around 2800 litres of fuel, enough to cover 25,000 miles at 40mpg.With this type of DPF regeneration will be initiated by the ECU every 300 miles or so depending on vehicle use and will take 5 to 10 minutes to complete. You shouldn't notice anything other than perhaps a puff of white smoke from the exhaust when the process is completed.

DPF Delete / Removal

Here at TopGear Stockport  we can reprogram your ECU so that your vehicle no longer requires a DPF to run properly. If you simply remove it from the vehicle it will put the car into Limp Mode, bringing up the engine light and losing all power. What we do is reprogram the ECU so that once the DPF is removed, the vehicle will continue to run as it should and not fall into Limp Mode, not bring up the engine light and NOT lose power.

In fact, the DPF restricts the flow of exhaust gasses meaning that even when it’s fully functional, it is restricting the power of the engine and in turn decreasing performance and miles per gallon (mpg). After we’ve reprogrammed the ECU and removed the DPF from the exhaust system, you will notice an immediate increase in performance and better fuel economy because less throttle is required to produce the same amount of power as before.

• DPF ECU Reprogramming
• DPF Removal
• Full Engine ECU Tuning Remapping service

Here is just a sample of the vehicles where Diesel Particulate Filters or tdi dpf’s can be removed, deleted or remapped and the vehicle engine management system used

Alfa Romeo DPF delete for = EDC16 – EDC17
Audi DPF delete for = EDC16 – EDC17 – Siemens PPD Audi dpf
BMW DPF delete for = EDC16 – EDC17 tdi dpf
Chevvy/Chevrolet DPF delete for = EDC16 – EDC17 dpt
Citroen DPF delete for = EDC15 – EDC16 – EDC17 – SID PSA – Delphi DCM3.x dpf
Fiat EDC16 – EDC17 – Marelli MJD
Ford EDC16 – EDC17 - Siemens SID Ford tdi dpf
Honda EDC16 – EDC17 - Siemens SID
Hyundai EDC16 – EDC17 tdi dpf
Jaguar EDC16 – EDC17 – Siemens SID
Kia EDC16 – EDC17 tdi dpf
Lancia EDC16 – EDC17 tdi dpf
Mazda EDC16 – EDC17 – Siemens SID
Mercedes EDC16 – EDC17
Mini EDC16 – EDC17 tdi dpf
Nissan EDC15 – EDC16 – EDC17 – SID PSA – Delphi DCM3.x
Opel DPF EDC16 – EDC17 – Marelli MJD
Peugeot EDC15 – EDC16 – EDC17 – SID PSA – Delphi DCM3.x
Renault EDC15 – EDC16 – EDC17 – SID PSA – Delphi DCM3.x
SAAB EDC16 – EDC17 tdi dpf
Seat EDC16 – EDC17 – Siemens PPD
Skoda EDC16 – EDC17 – Siemens PPD
Suzuki EDC16 tdi dpf
VAG EDC16 – EDC17 – Siemens PPD
Volvo EDC16 – EDC17 - Siemens SID
VW EDC16 – EDC17 – Siemens PPD (VW dpf)

DPF Delete software and tuning is becoming ever more popular and needed. Viezu technologies Stockport, the world leading provider of vehicle tuning services offer a full range of DPF removal, DPF delete, and DPF problem solving services
A DPF (Diesel particulate filter) or FAP (Filtre A Particules) is a device designed to remove diesel particles or soot from the exhaust gas of a diesel engine.
Whilst in theory the DPF system is a great idea, unfortunately the DPF system often gets blocked and this causes vehicle running problems, its often the low mileage drivers who get hit the hardest as the DPF system does not get a chance to regenerate.
Repair costs can be very expensive with some DPF systems costing over £1400. The filter is not a requirement for MOT test so one solution which is becoming ever more popular is to remove the DPF and remap the vehicles ECU to remove program – this is known as DPF removal or DPF deletion.

Is it Illegal to remove the DPF or will it fail the MOT?

It’s not obligatory by law to have a DPF on a diesel engine as only some cars have it installed and it’s removal is a completely safe procedure that will not (if carried out by us) effect your emissions and will not fail you on your MOT.