Air Flow Meter/Sensor: Description and Operation

1988 Oldsmobile Ninety-Eight V6-3800 3.8LSECTION Description and Operation


The MAF sensor measures the amount of air being consumed by the engine and sends the information to the ECM. The ECM uses this information to determine the operating condition of the engine and to meter the fuel accordingly. If the MAF sensor indicates a large quantity of air is being consumed, the ECM will recognize the engine is accelerating. If the MAF sensor indicates a small quantity of air is being consumed, the ECM will recognize this as deceleration or idle.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.