2001 Crown Victoria Fuel Pump

My 2001 Crown Victoria has hard morning starts(((hard start= cranking
for 10 seconds..letting go of the key and then engine starts, very hi
RPM in the "ON" postition)), but it starts fine for the rest of the
day. What could be the problem?! Already replaced, fuel filter, Air
idle control valve but no change. Some say it might be the Fuel pump,
or ignition switch? Also, Is the fuel pump located inside the gas tank
or outside? Is it somthing i can do myself? Thanks for the expert
advice!
John.