The Powerstroke, DMax, Cummings does not have a injector in the DPF. If you find and look at factory diagrams they do not show it at all. The lines that you see going to the filter are pressure sensors before and after. Aslo there are temperature sensors to read temps at the filter and after. Some diesel vehicles use differentail pressure, or mileage, or gallons of fuel burned.The Ford,GM, Ram use pressure difference. From what I've read they have been doing since 07.5 (GM)and 08 on Ford on Ram.
