Practice question

What is the primary function of the Mass Air Flow (MAF) sensor in an Electronic Fuel Injection system?

  1. To measure the volume of fuel returning to the gas tank
  2. To measure the mass of air entering the engine intake so the ECU can calculate the correct fuel delivery
  3. To measure the speed of the vehicle's driveshaft
  4. To measure the pressure inside the intake manifold

Answer: B — To measure the mass of air entering the engine intake so the ECU can calculate the correct fuel delivery

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