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Home >> Ford >> 1990 >> Festiva L >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Output Devices (Fuel Injection) >> Idle Speed Control By-Pass Air

Idle Speed Control By-Pass Air

The ECA controls both the idle speed and the by-pass air functions. The by-pass air valve is open when the coolant temperature is below 140°F (60°C).