Have a 99 cobra with50K on it. Just started having cranking problems. Sometimes will turn engine over but no response. Not an attempt to start. Sounds electrical. Fiddled with the fuses (none blown) and wires to the power distribution box and it cranked (first time), now fiddling with box doesn't help. Doesn't seem to matter whether hot or cold. Never stalled when running. Hall effect sensor?? Anyone else have this problem? Any ideas?