Found out the owner had by passed the amp gauge, but didn't tighten the nut holding the 2 wires together, that had previously went thru the amp gauge. So the entire elec system was getting fluctuating voltage! I finally ran a wire off a relay (12 volts positive) to the ignition side of the voltage regulator, and that helped alot. Then I found the loose connection where the PO had by passed the amp gauge. Tightened that up, now it charges a steady 15.5 volts!
