The Air Temperature sensor is in the same unit as the Air Flow Meter on top of the stock air box. The coolant temp sensor is mounted on the coolant outlet on the back of the engine, center, just above the transmission.
It doesn't have one. It uses a flapper type air flow meter which doesn't require an intake air temp measurement.
the water temp sensor in the earlier NA models are at the coolant neck in front of the engine. it's the plug pointing straight up on the 90-93s.
IF that is the Intake Air Temp sensor - It is probably on the throttle body. the other sensor is the TPS throttle position sensor
left of the dashboard
temp sensor on the 99 miata is on the back of the cylinder head in a housing. it's easy to see and get at with the coilpack removed. also wanted to correct an earlier answer on 90-93 miata temp switch, which is in basically the same place. the switch on the top of the thermostat housing front of engine is for the cooling fan.
Didn't have an air temp sensor in 92. Came out in 93.
The temp sensor switch is located on the right side of radiator ,at the bottom.
on the 13b engine it should be behind the waterpump, just below the thermostat.
Coolant temperature sensor is locatedat the front of the intake manifold near the upper radiator hose.
The intake air temperature sensor is located on the mass air flow sensor on the intake. There are five wires attached to the sensor.
Yes, a faulty coolant temp sensor can do that.
Try heater hoses.