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Home >> Saab >> 1991 >> 900 SPG >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Notes

Computerized Engine Controls: Notes

The computerized engine control system consists of 3 electronic control units (ECU's): a fuel injection ECU, an ignition ECU, and on turbo models, an automatic performance control (APC) ECU.