if ya dont have a scan gauge get one. they can be programed to check and monitor all the parameters you need to monitor except egt and maybe fuel pressure. I just used mine to check a couple of diesel class B+s. Both checked fine but one ran much better than the other. You can go to FTE and give your numbers and they will be able to tell ya if they are OK. Consensus on my truck everything was fine but it appeared the alternator was low on output, so I ordered a 160amp alternator for it.
The scan gauge can be had from Camp World for about $150 or autozone for about the same or less. You might be able to score on amazon or someplace like that also.