THE XTREME TUNING SOLUTION TO DPF PROBLEMS
DPFAs with any filter, to ensure a DPF can work efficiently, it needs to be clean and clear. This should happen by default with a process called regeneration. Naturally, this would take place in diesel vehicles that spend more time running at optimum engine temperature; under these conditions the DPF periodically clears itself once heated to its optimum temperature.
In situations where the engine is running at less than its optimum temperature, such as during frequent stop/start driving or a series of short trips, the filter can’t clear itself. As a result it eventually gets clogged with soot that affects performance, economy and emissions.
It can be prevented by periodic (at least monthly) higher speed runs on an open road, but once symptoms of a build up of soot occur such as a fall-off in performance or the DPF warning or anti-pollution light illuminating, then it’s usually too late.
The DPF would require replacement at usually considerable cost – possibly well into four figures.
Even the DPF in a vehicle spending more time at its maximum engine temperature will lose its regeneration capabilities in time so will require replacement. Manufacturers class the DPF as a normal ‘wear and tear’ item similar to brake pads and clutches, so it isn’t covered by the vehicle warranty.