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Home >> Mazda >> 1987 >> B2600 Base, 2D Pickup >> Repair and Diagnosis >> Engine Performance >> System >> 2.6L Feedback Carburetor System >> Operation >> Input Devices >> Deceleration Vacuum Switch

Deceleration Vacuum Switch

Vacuum switch is operated by intake manifold vacuum. When throttle valve closes, intake manifold vacuum closes switch. The voltage on FCU side is grounded and FCU senses throttle valve opening is near idle position. This information controls air/fuel mixture at idle with secondary air control.

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