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Home >> Pontiac >> 1991 >> Trans Sport Base, 3T40/MD9 >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Basic Testing >> C-4, Basic Ignition System Checks (Gasoline) >> HEI-Est Distributor >> Notes
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HEI-Est Distributor: Notes

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