Retard Components
WARNING: This page is about a different car, the 1991 Saab 9000 and 1991 Saab 900. However, it is still accessible from the selected car via links, so may be relevant.
All models are equipped with a knock sensor. 900 Turbo vehicles are equipped with a retard cylinder on the distributor, which retards timing in response to increasing boost pressure. Except for those components, all retard functions are controlled by the ignition ECU. See KNOCK SENSOR and RETARD CYLINDER (900 TURBO) .