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Pontiac
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1997
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Firebird Formula, 2D Convertible, 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 - Tests W/O Codes - 5.7L
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Symptoms
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Engine Backfires
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Symptom Definition
Symptom Definition
Fuel ignites in intake manifold or in exhaust system, making a loud popping noise.