Hey Mudder,
My gut feeling says it's a fuel thing and it's not getting enough fuel/air mixture to fire.
A spark thing will usually show up before, during, and after firing.
Based upon what you have done to this rebuild, you have probably installed a new gas filter.
Have you disconnected the banjo gas fitting to see if you are getting fuel to the cold start injector and you have ohmed the terminals on the thermo time switch?
Did you disconnect the battery to see if the ECU will reset and possibly clear any bad sensor data?
I'm still trying to figure it out?
?
Gnarls.
