I'm very new to the mentioned topic, but I bought the software and connector and have been able to tap into my HPDI a few times, some cool stuff in there. I don't believe I have had the motor running with my computer hooked up, so maybe that might answer some of my questions. I'm able to read how many total hours the engine has, can actuate fuel pumps, coils, injectors, that sort of thing. But, shouldn't I be able to read how many hours at specific RPMs as well? I'll have to look to see which software version I have, but I would imagine I should be able to see these things. Any help would be great.