BJ64- Yes that's EXACTLY what it does as you mention. It too started by getting a little further along in the start cycle, but decreased to just the propane now.
I will continue to isolate now.

I've have not changed anything prior to this problem, but who knows?

fw190- will try disconnection the plug immediately and see what happens-will have to think about how to do it fast.

will break out the blower if the other ideas are failing.

I will be out starting it in the morning so will let you all know how it's going-we'll get it solved

thanks

Jack