replaced fuel pump. Car starts fine runs fine but will not start after running on 1993 Ford Mustang LX

or driving for 20-30 minutes. Cranks but no start

Asked by for the 1993 Ford Mustang LX
You live in Mechanicsville, just yell, "HELP MY CAR WON'T START"!!!!

What engine, 4 or 8 cyl.? Have you checked anything? Fire to plugs when not starting?