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Home >> Ford >> 1976 >> Pinto Pony, 2D Sedan, Automatic Trans, Trans Mfr CD C3 >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Feedback Carb. System >> Operation >> Electronically Controlled Feedback Carburetor System >> Cold Temperature Vacuum Switch (Non-Turbo)
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Cold Temperature Vacuum Switch (Non-Turbo)

Switch is connected to the 3-way ported vacuum switch, which supplies vacuum when engine coolant temperature is below 125°F, closing the switch contacts. This tells the ECU to operate system in "Open Loop" mode. With coolant temperature above 125°F, the switch contacts open, the ECU operates system in "Closed Loop" mode.

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