Fuel sensor

I have a 97 Jeep Grand Cherokee Limited, V8 with 133K miles that in regular driving will behave properly but after slowing for a light or in traffic situations will behave like it is fuel starved or will begin to miss. If I let off the throttle it will return to running fine. I had a code in the computer that said the 02 sensor was bad and I replaced it, there was another code that said something about a fuel rail sensor and I need help on its location and where to purchase this item please help