2000 civic with roughly 192000 miles on it.. was running fine and just shut off. like it's out of gas. thinking the gauge was bad, I added gas and nothing. has a strong crank, just doesn't fire up

 

Welcome in,it could be anything from a bad relay to a fuel pump fail,cam position sensor to a distributor.its hard to track down these problems,start by pulling off a fuel line and cranking to see if fuel is getting through,pull codes to see if any have set.goid luck.

 

Might have broken a Timing Belt? Has the Timing belt ever been replaced?

 

192,000 miles isn't bad. I also assume you got the full 17 years out of it as well?