[hypoxia]

I've replaced the DEF Doser, reprogrammed the ECM, and replaced the gasket and clamps after the crosspipe where the DEF has been dripping.

I'm not buying the excuse that "some just leak". Can't be right and I'm still not taking no for an answer.

Is the ECM programed to the factory original settings?  What Horsepower?  What is your DEF consumption rate, ie 50 gallons of fuel to 1 gallon of DEF?  I'm wondering what tests can be run with Cummins Insite relating to DEF?   I'll hook it up if I get time today and see what Insite will do, fortunately I have not had that problem.