I’d check for spark and fuel pressure, then. A parts store will have a tester, see if you have spark at all eight plugs or if any show a weaker spark compared to others.
Fuel pressure should be 60-66 psi with ignition on, engine off. A parts store would probably rent a test kit, or you can get one at Harbor Freight for pretty cheap.
As a quick check for a flaky coolant temperature sensor, try holding the gas to the floor while cranking.
You could also spray some starter fluid down the throttle body; replace the air intake before trying to start. If it starts and runs, it’s probably a weak fuel pump. If it starts and dies, then it’s a lack of fuel (bad pump or injector issue). If it doesn’t start at all, then it’s probably ignition related...check for spark then.
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