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Home >> Chevrolet >> 1987 >> Spectrum Base, 2D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> System >> High Altitude Compensation System >> Description

High Altitude Compensation System: Description

The high altitude compensation system is designed to prevent excessively rich carburetor mixture and stabilize engine RPM at high altitudes. This is accomplished by the use of an altitude sensing switch, solenoid valve, and high altitude idle-up solenoid valve.