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Home >> Geo >> 1991 >> Metro LSi, 2D Convertible, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Idle Control System >> Timing Control Systems >> Mechanical Advance (Metro & Metro LSi W/O ESC)
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Mechanical Advance (Metro & Metro LSi W/O ESC)

Remove distributor cap and turn rotor clockwise. Release rotor and observe movement. Rotor should smoothly return to full rest position. If mechanical advance performance is incorrect, replace distributor.