My engine is turning but it won't start

a broken plug would not cause a no start re ck. you crank & camshaft timing

I rechecked my timing chain and it is set like the book says. The engine turns but it's not firing.

Make sure battery has a full charge and connections all good. Have helper crank it while you check for spark at the plugs. If spark everywhere, use a gage and check proper fuel pressure and fuel injector pulse. Any applicable trouble codes? Do you have cylinder compression? Double check your work make sure you didn't knock any sensor connectors loose.