Before discussing how Regen works, there are a few things you will need to know: Soot is a byproduct of unburnt fuel, it is also called "particulate matter". DPF Diesel Particulate Filter, traps soot in the exhaust. Regen The process of burning off accumulated soot in the DPF. The soot is converted to ash.
How long does it take for a DPF to regenerate? While thorough DPF regenerations can take up to an hour, this varies on the level of soot, condition of your DPF and model of your car. In general, DPF regeneration will take between 20-60 minutes (though forced regeneration can run for longer), so bear this in mind if you see your car begin an With the VGT turbos on a Cummins they close them to about 89% to increase exhaust back pressure, which increases load on the engine, which increases exhaust heat. 1100 is fast enough. Regens can last up to 2.5 hours with an ISX. 40 mins is about average. Keep track as best you can how long they are taking.