I have a 1991 four cylinder Ranger and temp sensor don't work. I went to Autozone and bought a temperature sending unit and a temperature sensor. I cant find either of these two on my engine. Does anyone out there know if these parts are whats wrong and if they are. Were are these sensors located. Thanks

 

The sending unit threads into the head right behind the intake manifold.
I'm not sure about a sensor. There is another unit that threads into the block under the intake. Maybe that's the sensor. ??