Its been my experience that a coil either works or it don't no in between. I have at least 6 coils on my work bench and I have no idea if they are any good or not. I try to measure them with a digital multi meter and get a different reading from every one of them.
What is a good way to measure them or test them. Guess I should have kept that tester I made LOL. Do these have any resale value or should I just give up and toss them in the trash Tuesday?