Car shuts off intermittent and doesn't start intermittently

https://www.2carpros.com/articles/car-cranks-but-wont-start

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if okay-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,coil's resistances,cap and rotor,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing

They had a lot of ECM and Crank sensor failures around that year that caused symptoms like that but it still needs to be diagnosed properly as Ras suggested.

I would suspect a shorted injector, one bad injector alone can cause these symptoms.I repaired to many of these to count. What you want to do is unplug the injectors one at a time and ohm test them. And then compare the readings from each one, i'll bet you'll find atleast one that's real low.