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Home › GMC › 1992 › Forward Control 5.7 K, Automatic › Repair and Diagnosis › Engine Performance › System › Engine Controls - Basic Testing › C-4, Basic Ignition System Checks (Gasoline) › HEI-Est Distributor › Notes

HEI-Est Distributor: Notes

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