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Home >> Ford >> 1990 >> Bronco II RWD, Standard, M5OD-R1 >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Input Devices Operation >> Idle Switch
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Idle Switch

The idle switch is threaded into throttle body and contacts throttle linkage. It signals ECA when throttle valve is fully closed. This switch signal affects air/fuel ratio, injector timing, idle speed, EGR flow and ignition timing.