Replace coil. Check power to coil first with a test light. If there's power, then coil is bad or the problem is under the distributor cap. Could be air gap has moved wider or the rotor tip is dirty. Clean it and try again. It's rare the air gap will move. Could be some rust on the rotor from condensation. clean it all. Try it. still no run, replace the coil.
Answers & Comments
Replace coil. Check power to coil first with a test light. If there's power, then coil is bad or the problem is under the distributor cap. Could be air gap has moved wider or the rotor tip is dirty. Clean it and try again. It's rare the air gap will move. Could be some rust on the rotor from condensation. clean it all. Try it. still no run, replace the coil.