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Home >> Mercury >> 1988 >> Tracer 4D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> MPFI System >> Operation >> Outputs >> ISC Solenoid
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ISC Solenoid

The ISC solenoid is controlled by the ECA. On deceleration and during high altitude operation, the ECA uses the ISC solenoid to provide increased airflow to the intake plenum.