1994 Mercury Tracer trio The car cranks but won't start

I have a 1994 mercury tracer trio. The car cranks but won't start, i've changed the fuel filter, timing belt, spark plugs, spark plug wires, transmission coil, and crank shaft position sensor. Still nothing. Can you tell me anything else it could be. We're getting fuel to the engine, and we've done timing belt and did all spark we can think of, but we're also not getting blue spark. I don't know what else to do