Section 1 (SPFI CEC System): Description
WARNING: This page is about a different car, the 1988 Subaru RX, 1988 Subaru GL-10, 1988 Subaru GL, and 1988 Subaru DL. However, it is still accessible from the selected car via links, so may be relevant.
Subaru vehicles equipped with Single Point Fuel Injection (SPFI) have an on-board computer that controls both fuel and ignition. It electronically controls amount of fuel injected by monitoring exhaust gases with an oxygen sensor.