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Home >> Isuzu >> 1988 >> Pickup Base, 4WD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Closed Loop Emission System >> Operation >> Electronic Control Module >> Enrichment Mode

Enrichment Mode

Fixed, pre-programmed duty cycle electrical signal is sent to the vacuum control and duty solenoid by the ECM. This signal is sent to the solenoid when fuel enrichment is necessary for cold engine starts or sudden acceleration.