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Home >> Mercury >> 1985 >> Cougar XR7, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> THERMACTOR System >> Operation >> THERMACTOR Idle Vacuum Valve
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THERMACTOR Idle Vacuum Valve

Thermactor Idle Vacuum Valve (TIV) vents vacuum signal to atmosphere when preset manifold vacuum or pressure is exceeded. During periods of extended idle conditions, this valve is used to divert thermactor air flow to limit exhaust temperature and to cut EGR in a heavy boost mode for turbocharged applications.

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