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Home >> Chevrolet >> 1987 >> Cavalier/Z24 V6-173 2.8L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> Function Selector Positions >> MAF - Mass Air Flow Sensor >> With Speed Density
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With Speed Density



Indicates the amount of air passing sensor in grams per second (gm/sec). Normal readings are 4-7 gm/sec. If code 33 or 34 is set, reading will display Engine Control Module (ECM) default value.

NOTE: Vehicles equipped with Speed Density Do Not use the Mass Air Flow (MAF) sensor. There will be no output signal. Test as a 1989 vintage vehicle.
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