1997 ford Taurus dohc turns over but won't start. on 1997 Ford Taurus

it turns over but won't start, I changed the ignition coil, crankshaft sensor, it started up and ran for little while but then it shut off, it turns over but won't start.

2 answers 2 comments
Had this issue with a 98 v6 mustang, I replaced a lot of minor things like fuel regulators etc playing the guessing game, then went with my gut feeling, changed the fuel pump and started right up. This may or may not be your problem, but I figured my experiance may help.
could the catalytic convertor do the same thing?
Need to/Got to know IF it has good hot spark to the plugs, then how much fuel pressure it has.
could the catalytic convertors do the same thing?