Detroit dpf system nightmare

I own a 2008 freight liner with a 60 series engine. After 4 years of nightmare repairs and a engine being replaced only after 80000kms, I'm having same issues with new engine, no power , engine seems to derate itself and feels like I no turbo boost. So much for my new truck experience feeling. I've had none. I've lost track of all my down time weeks for them trying to find out why these problems are occurring .Over 4years I have had : 3 new dpf,s. new injectors, new head, new ECM, about 5 new programs for ECM, then they replaced engine, then no power problems start again: black smoke, no power, new injectors installed. Wow! I have had enough of down time at my expense for there engine reserch! They don't tell me why these problems are occurring . " They don't know why! ". Scary. I'm now waiting for a call from a Canadian Detroit rep . I have a service to provide to for a company, this truck is a big problem. Something has to be done, I've had enough of this as a customer of a new truck. Please respond to this letter. Thanks.

 

Thanks for the reply guys, my regen and dpf issues.