I have been recieiving a P0452 Code on my 1998 Ford Ranger even after I changed the Fuel Pump and Gas Cap. Do I have to drop my gas tank again and check the fuel pump wiring or did I install a bad gas pump.

That code would seem to indicate that there is an electrical problem with the fuel tank pressure sensor. I'm not sure where it is located on your particular truck, but in most applications, it doesn't have anything to do with the fuel pump itself. You will probably have to drop the tank again though.