I guess the question to ask is were your three coils made in China? Would be hard to believe that three went bad within such a short time no matter where they are made. There are some standards that a manufacturer has to meet. I guess the US made coil is cheap enough to see if it is the problem. Let us know if you have success and the brand of your faulty coil(s) if that proves to be the problem.

Where Are You From? Orygun

Do You own a car built by Durant? 1930 6-14