These symptoms indicate a MAF that has a contaminated hot wire. There are a number of driveability issues that arise from faulty MAF sensors. This equates to more air into the engine or less air into the engine. Whenever the temperature difference between the two sensing wires changes, the MAF will either increase or decrease the current to the heated wire. The microprocessor (computer) inside the MAF determines the amount of air entering the engine by how much current is required to keep the hot wire about 200 ℉ hotter than the cold wire. There are several designs of MAF sensors, but the most common by far is the hot wire MAF sensor. The PCM uses this input to calculate engine load. Mass Airflow Sensors (MAF) have the responsibility of reporting the amount of air entering the engine to the Powertrain Control Module (PCM).
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