Where is the fuel temperature sensor in a 1997 Nissan pickup FWD four cylinder?

There isn't a fuel temperature sensor in a 1997 Nissan Pickup (Frontier) with a four-cylinder engine in the same way that some fuel injection systems have one. These older systems typically rely on ambient air temperature sensors and engine coolant temperature sensors to adjust fuel delivery. The engine's computer makes adjustments based on these readings, rather than directly sensing fuel temperature.