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Ford
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1997
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Aspire 2D Hatchback, Automatic
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Tests W/O Codes
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Symptoms
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Spark Knock
Spark Knock
Check cooling system for overheating.
Check ignition system. See CIRCUIT TEST JA in the
TESTS W/CODES
article.
Check for vacuum leaks.
Check EGR system. See CIRCUIT TEST HE in the
TESTS W/CODES
article.