1992 Nissan Sentra car wont start

It doesn't mean that the fuel pump is okay bcuz its making a humming noise-check the fuel pressure before and after the filter to confirm the fuel pump is producing fuel pressure.

Could very well be an ignition system problem. Do below and tell me what happened.

Get a starting fluid or ether and spray into the carb or the throttle body on an EFI. Did it start and die? If not disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, distributor pick-up coil, ignition control module, cam and crank sensors- Note: If it doesn't apply disregard it

Next time it won't start immediately look for spark-