Hi Paul,
You may have fried the Petronix. Thisis from the installation instructions:
"Q. What happens if you leave the ignition switch on when the engine is not running?
A. This can cause your coil to overheat, which may cause permanent damage to the coil and the ignitor."
This is how you can test the unit:
http://www.ttalk.info/Tech/PerPosGndTest.htm
