I recently got a 94 sentra as a daily driver and I believe the fuel pump is shot because it will not start and I don't hear the pump. I checked the fuse and pump relay. They are ok. The car will turn over but no start. It was running fine when I parked it. How difficult would it be to change the pump on this vehicle? i.e time, manpower,. If anyone would be interested in giving me a step by step description, that would be even better. I don't know much about this car at all, it was given to me by a friend. Thanks in advance.