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Home >> Pontiac >> 1991 >> LeMans Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Ignition System >> Timing Control Systems >> Electronic Spark Timing (EST) Function
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Electronic Spark Timing (EST) Function

For information and testing procedures on ECM-controlled timing advance, see DIAGNOSTIC CODE CHARTS, Code 42 chart, in the article TESTS W/CODES in this section.

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