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Home >> Mazda >> 1985 >> 626 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Feedback Carburetor System >> Operation >> Vacuum Switch
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Vacuum Switch

Vacuum switch is part of a system to improve driveability while driving at high altitudes. When intake manifold vacuum nears atmospheric pressure, vacuum switch will turn off and send a signal to the ECU. The ECU will send a signal to air/fuel solenoid in carburetor to supply additional fuel.

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