Fuel, fuel pump, fuel filter are good. Whats Next?

What is your question?

1999 Ford Taurus. Car was running perfectly. Started car then it died. Have check for fuel, checked fuel pump and replaced fuel filter. Car cranks fine but does not start. Any suggestion on where to look next? William What seems to make the problem better or worse? No Change; car turns over but does not start How long have you had this problem? just started