Airflow Meter Testing

1991 Subaru Legacy L, 4D Sedan, AWD, StandardSECTION Airflow Meter Testing

Remove rubber cover from electrical connector on airflow meter. Leave connector connected. Connect volt/ohmmeter between terminals and record readings. See AIRFLOW METER SPECIFICATIONS table. If readings are not to specifications, check electrical wiring. If wiring is okay, replace airflow sensor.

NOTE: DO NOT start engine unless specified. Place the ignition switch in the OFF or ON position as indicated.
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When to See a Mechanic

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

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