Ok, something changed and bad component swapped sides...
Good idea is to never change system for troubleshooting. Non-interference because you'll introduce extra variables into system. Leave everything as-is and gather data through measurements only. There's something that hasn't been measured yet, and it's been swapped as part of troubleshooting.
Order that solenoid light, it'll tell us for sure about grounding pulses from ignitor. Test first at ignitor connector itself to see if it's working. Then at coils to see if signal made it.
Yeah, bad ignitor is possiblity. Lemme see if I've got spare I can send you to test.
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