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Pontiac
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2001
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Firebird Formula, Automatic
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Repair and Diagnosis
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Engine Performance
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System
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Engine Control System Self-Diagnostics - 5.7L
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Inspection/Maintenance Procedures
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Inspection/Maintenance Heated Oxygen Sensor System Set Procedure
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Conditions for Running
Conditions for Running
Engine Coolant Temperature (ECT) is more than 57°C (135°F).
Engine is running in closed loop fuel control.
Engine has been running for more than 160 seconds.
Battery voltage is 9-18 volts.