Barry,
DC techs can't see it... You have to use the Cummins software & datalink, and then it shows up as a fueling anomaly. First, it shows up as a warning, right you you begin to scan the ECM. Then, as you get further into it, you being to see that some of the fuel numbers do not match--fuel consumed/demanded. Most techs won't pick up on it, unless they really know the system well. DRB scanners cannot find the trail left by the EZ or VA, or whatever it is that's hooked up. If DC is Big Brother, that makes Cummins the father... Father always knows. :{