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Saturn
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2003
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Ion 2 4D Sedan, Standard
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Trouble Shooting
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Symptoms
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Lack Of Power, Sluggish Or Spongy
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Sensor/System Checks
Sensor/System Checks
Monitor the Knock Sensor (KS) system for excessive spark retard activity with a scan tool.