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Home >> Geo >> 1991 >> Tracker Base, 4WD, Standard >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Fuel Control System >> Electrical Load (Metro)
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Electrical Load (Metro)

ECM monitors a signal from diode module to determine electrical load caused by cooling fan, blower motor, rear defogger, stoplight or headlights. When voltage decreases below a specified value, ECM increases idle speed. As voltage increases, ECM readjusts the idle speed.