I have used the VMSpc on my bus conversion since 2006, right after I had the bus repowered to a Cummins 450HP ISM. I currently run the VMSpc with Version 3.0, Build 1.
During recent trips, I have found some of the data displayed fluctuate consistently, up and down, usually by more than 10%.
Some of the gauges are stable, those being oil pressure, coolant and oil temps, miles, all the mileage (odometers), mpg, gph, cruise and speed.
The ones that vary constantly as said above are:
tach (rpm), turbo (boost), Power (HP), Torgue and Load (%). .
I am using a ASUS netbook computer with Windows 7.
Any help. What am I dealing with. I ruled out connection problems due to the stability of some data, but fluctuations of others. Could it be my Engine ECM? If so, what can be done about it?