LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 1988 >> Spectrum Base, 2D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Feedback Carburetor System >> Operation >> Input Sensors >> Altitude Switch
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Altitude Switch

At a given altitude, the switch will close and energize a solenoid valve and idle-up solenoid valve. This will signal ECM of high altitude condition and increase air flow to carburetor idle and off idle circuits.