While driving my voltage showing on VMSPC fluctuates from 13.2 to 14 volts. It reads 14. - 13.8 - 13.6 - 13.4 - 13.2 Each voltage seems to hold for about two seconds. It is pretty regular and I am wondering if it is just the nature of VMSPC or do I really have such a wide fluctuating voltage while driving?