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Home >> Chevrolet >> 1988 >> Corvette 2D Convertible, Automatic >> Repair and Diagnosis >> Engine Performance >> Ignition System - HEI-Est >> Testing >> Ignition System Check >> Notes
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Ignition System Check: Notes

NOTE: Before testing, obtain Spark Tester (ST-125). If tachometer is connected to ignition coil "TACH" terminal, disconnect it before performing tests. When performing tests, use digital voltmeter with at least 10-megohm input impedance.
CAUTION: When removing spark plug wire from spark plug, twist and pull on boot, NOT on wire.