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Home >> Mercury >> 1986 >> Capri Base, 5.0 F >> Repair and Diagnosis >> Engine Performance >> System >> THERMACTOR System >> Operation >> Idle Tracking Switch
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Idle Tracking Switch

The Idle Tracking Switch (ITS), located on the carburetor, is a mechanically operated electric switch held open by the throttle linkage when the throttle is closed. It is used on the Extended Idle Air By-Pass System.

When the ITS is opened, the EEC module is signaled to de-activate the normally closed solenoid. When this happens, vacuum is removed from the normally closed by-pass valve, and the thermactor air is released into atmosphere.

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