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Home >> Buick >> 1980 >> Skyhawk Base, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Computer Controlled Catalytic Converter System C-4 >> Operation >> Engine Sensors & Switches >> Lean Authority Switch (LAS)

Lean Authority Switch (LAS)

The LAS monitors heated inlet air through the air cleaner thermal vacuum switch to prevent a too lean mixture during cold engine operation.