That is why my edit included trying out the GY6. so " test with known good igniter" could be the only simple answer!
I have always worked my tests with a good igniter and I still carry one in my "Electrical" tool box, but even that is not really an easy option these days. That is the only reason I am playing around with the idea. Most people do not have access to "known good" just chineseum "Unknown"
As to highjacking the wrong thread in your other post. I blame you every time. I wont take any credit for it so wont get banned.