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Home >> Subaru >> 1983 >> DL 4D Sedan >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Ignition Control System >> Description
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Ignition Control System: Description

Ignition control system is designed to reduce emissions by controlling ignition timing. System consists of a vacuum advance unit on the distributor, thermo vacuum valve (also operates EGR system), vacuum lines, and orifice/check valve (1600 cc models only).