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Home >> Pontiac >> 1999 >> Firebird V8-5.7L VIN G >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> Scan Tool Data Definitions - Powertrain Systems >> AIR Fuel Ratio
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AIR Fuel Ratio

The scan tool display indicates the Air to Fuel Ratio. The Air Fuel ratio is determined from the Heated Oxygen sensor output. The PCM uses the fuel trim to adjust fueling to attempt to maintain an Air Fuel Ratio of 14.7:1.
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