Replace the fuel filter if you haven't already. When you crank the engine does the little engine light on the dash go out while your cranking? if not the CKP (crank sensor) isn't being picked up by the ecu, car won't start. Check your fuses, use a "noid" light to test the injector harness/electrical function, a normal low impedance test light will fry the drivers in the computer, so for gods sake don't use one. Check that first.