GM Firebird 1982-1992 Repair Guide

Mass Air Flow (MAF) Sensor


See Figures 1 and 2


The Mass Air Flow (MAF) sensor, found on some fuel injected engines, measures the amount of air passing through it. The ECM uses this information to determine the operating condition of the engine, to control fuel delivery. A large quantity of air indicates acceleration, while a small quantity indicates deceleration or idle.

The MAF sensor used on these vehicles is of the hot-wire type. Current is supplied to the sensing wire to maintain a calibrated temperature, and as air flow increases or decreases the current will vary. This varying current is directly proportional to air mass.

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Fig. Fig. 1: MAF sensor


  1. Disconnect the negative battery cable.
  3. Disconnect the sensor electrical connection.
  5. Loosen the clamps and remove the air intake hoses from the MAF sensor.
  7. Remove the sensor from the vehicle. On some models it will be necessary to remove the sensor-to-bracket attaching bolts.
  9. Installation is the reverse of removal.

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Fig. Fig. 2: Mass Air Flow sensor mounting, all models similar