Several possibilities. Either no ignition or no fuel to the cylinders.
First determine the fuel pump is running when you crank. If may have failed. You will have to crack open a fuel line (or install a service test gauge and measure the pressure).
Second -if fuel pressure is good-- no ignition spark. If there is fuel and fire--its gotta run. No spark can be caused by 1) crank angle sensor --measures the rotation and decides when to fire -automatically sets the timing. If no signal, no spark. Fuel injectors also will not open.
2) Engine 'ECU' faled/malfunction'. Ford (Motorcraft )made for many years ignition control modules with a defect in the circuitry. Every once in a great while --no spark. You could 'reset' the module by briefly (just a spark touch) by reversing the battery connections
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