My 65 fury lll won’t start I drove it to the restaurant and went to leave , no spark ? I towed it home and put it in the garage and check a few things , the coil has power to it with the key on but no spark to the plug. I pulled the plug out and laid it on the exhaust manifold when I crank it no spark ? The crazy thing is when I turn the key off I get a spark ? I tried a different coil same thing. I think my control module is ok ? I made sure it has a good ground, I would be grateful for any help.