When i come to an idle or let off the gas pedal i am seeing blue smoke coming out of my stacks. I only get it at idle or when im coasting at low rpms. Im not getting any codes. Wondering if its injector problems or oil coming around my turbo bearings or something else? Any wise help appreciated.

 

This is goin to sound stupid, but it depends on the smell of the smoke. You can rule it out easier I think smelling for burning oil. If it smells like fuel burning then it most likely is the injectors. Cheap fix could be some fuel system cleaner but once injectors start to go, there's usually no fixing them. Injectors are very expensive, as I'm sure you know, so I would do everything you can to be sure it's them. Maybe a good time to upgrade