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Home >> Mercury >> 1985 >> Capri RS, 5.0 F >> Repair and Diagnosis >> Engine Performance >> System >> THERMACTOR System >> Operation >> Idle Tracking Switch
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Idle Tracking Switch

Idle tracking switch, located on carburetor, is a mechanically operated electric switch held open by throttle linkage when throttle is closed and is used on Extended Idle Air By-Pass System.

When idle tracking switch is opened, EEC Module is signaled to de-energize normally closed solenoid. When this happens, vacuum is removed from normally closed by-pass valve and causes thermactor air to be dumped into atmosphere.

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