Camaro IROC-Z V8-350 5.7L VIN 8 FI (1990)
Manifold Air Temperature (MAT) Sensor: Description and Operation
Intake Air Temperature Sensor
The Manifold Air Temperature sensor (MAT) is a thermistor mounted in the intake manifold. Low intake air temperature produces a high resistance,
while high intake air temperature produces a low resistance. The ECM supplies a 5.0 volt signal to the sensor through a resistor and measures the
voltage. By measuring the voltage, the ECM can determine MAT.