A/C Idle-Up System
When A/C compressor clutch engages, ECM turns on the A/C idle-up valve, which allows air to by-pass the throttle valve. This increases engine idle speed. A set screw on the A/C idle-up valve adjusts the volume of by-pass air.
When A/C compressor clutch engages, ECM turns on the A/C idle-up valve, which allows air to by-pass the throttle valve. This increases engine idle speed. A set screw on the A/C idle-up valve adjusts the volume of by-pass air.