Remove the heat shrink from around the sensor and wires.
I have had one which had a broken wire and gave me an intermittent run.
Solder the wire back together and run.
ORIGINAL: Swat Cop
I believer it is the Hall sensor. I did the diagnostic test and it sparks when the switch is turned on. I called Keith and he is sending me a new Hall sensor. That was a week ago so it should be here soon.