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Home >> Isuzu >> 1991 >> Pickup S, 3.1 Z >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - CARBURETED >> Ignition System >> Timing Control Systems >> Vacuum Advance
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Vacuum Advance

Apply vacuum to diaphragm. Ensure vacuum advance moves and holds vacuum. If no movement occurs, replace vacuum advance. Ensure breaker plate is not binding.

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