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Home >> Geo >> 1990 >> Tracker LSi, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - System/Component Tests >> Timing Control Systems >> Engine Controls - System/Component Tests >> Vacuum Advance
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Vacuum Advance

Remove distributor cap. Remove vacuum hose from 3-way connector and attach hand-held vacuum pump. Apply vacuum while observing advance plate assembly. Advance plate assembly should operate with a smooth movement and vacuum should not bleed off. If vacuum advance performance is incorrect, replace vacuum advance. Service or replace advance plate if it does not perform as specified.