Actually when in operation it allows additional fuel into the carburetor through an enriched jet to richen up the mixture when the engine is cold. From what I understand there is a thermal resistor that provides power to the solenoid until the resistor heats up and removes the power. It’s a 12 VDC circuit.
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1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2
Mike
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