Our state of the art Diesel Particulate Filter cleaning system uses what we call "Dual Force" technology where compressed air and intense vacuum is used simultaneously to push from the top and pull from the bottom to force the contaminated soot from the filter cells. The EvacuBlast has a built in pressure differential test system to evaluate the filter before, during and after the cleaning process is completed. Each filter has a different "flow pattern" on where the exhaust enters the DPF while on the vehicle. These flow patterns usually create more soot concentration in specific areas of the DPF. We call this the "gum ball". Our system allows us to work on the "gum ball" area until clean. Filters are also baked due to amounts of wet soot and unburned hydrocarbons and must be baked in order to regenerate the soot to ash.