My 91 honda civic dx died when I was driving. It never started again. The starter tested good. How ever it is not turning the motor. I was told it could a bad flywheel?

It's unlikely that the ring gear is bad. See if this link helps:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-3.html#post235560

Ensure the clutch pedal is depressed, when you try to start the engine.