Diesel Pusher Blues

I have replaced dozens of injectors and many turbos in all three major light truck diesels and plenty of heavy equipment. A little knowledge would have helped you out alot and saved you a ton of money. A constant amount of smoke under normal driving like you described screams injector trouble. Any newer dpf equiped truck won't smoke if it is stock and working correctly. When you saw the s.oke you should have got an egt gauge or even used a cheap infared thermometer on your exhaust manifold near different cylinders. Then you would have known you had Injector problems. Could have been fixed for a few hundred bucks. Now I have no doubt that your turbo is done. A stuck injector will do that. And you should have deleted your dpf system instead of spending the money to replace it.

If you buy the right diesel and know how to maintain it they are truly very compatible in money to gasoline engines. If you buy the wrong ones or don't know how to do basic mechanic work they can cost you. I have nearly a million miles on my last three Cummins with a few thousand in total repairs outside of maintenance.