I do not know as much as the others, although I agree. May just be as simple as a bad coil or a used-up coil. I am sure you will find an answer. Good luck to you and welcome to ECF.
If my memory serves me, it seems like I have wrapped a coil in a napkin to absorb excess and put it back in and it worked. Not sure if that still works or will help at all. Just a thought.