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Auto Service Professional

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October 2021

Volume: 11
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MAF System Diagnostics Need Special Attention

Mass Airflow Sensors are Critical for Obtaining Proper Air/Fuel Ratio, but Understanding This Sensor is Important for Diagnostic Efforts

For an engine to run most efficiently and supply the catalytic converter with the proper gasses, it can convert to non-harmful emissions, the engine’s air-fuel ratio must run as close to the proper stoichiometric ratio as possible.


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