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Home >> Chevrolet >> 1990 >> S10 Blazer 2D Utility, RWD, Automatic, 4L60/MD8 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Basic Ignition System Checks (Gasoline) >> HEI-Est Distributor

HEI-Est Distributor

NOTE: Only basic ignition timing is adjustable in HEI/EST ignition system.