Polaris run good all but 4 wheel drive would work sometimes and wouldn't other times. went to start it one day and nothing. new plug, no fire, put new coil on nothing, changed cdi box nothing, disconnected black wire to kill switch and still no fire, charge coil resistances checks good, pulse coil air gap good. trigger coil resistance good .with the white/blue wire that comes from cdi box to coil shows power hook it to the coil then nothing same way with two different coils. Anybody know what the problem could be thanks in advance.