wow this is frustrating! last night after much testing and swapping of parts it was perfect 13.2 or so at idle and 14.5 when revved. start it this morning and I get 16.7 at idle! it is like I have a gremlin in there looking to screw me around! I have tried two different alts. three v regs. a new starter relay new ballast resistor cleaned and added grounds sripped and checked all wires. it seems like we have it sorted then it just starts to over charge again. any fresh Ideas?