Tempature effect on ignition modules
Ice or heat applied to them will let the engine start and have good mag checks.
I had not started the plane in over a week, last night the temp dropped to only 55 degrees/60 in hangar.
This morning I tried it and it started fine at 62 degress. I dont know where the cut off temp is
But it dont work at 78-95 unbelievable to me. New modules still backorded.