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How does the idle change when the ac compressor is on? 700

posted by  fixit2003 on  Sat Aug 27 02:40 CST 2005
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Does anyone know just how the idle is increased when the ac compressor comes on? On my older carburated cars the throttle linkage was simply(?) pulled by a solenoid. I've read some people say it has something to do with the idle air control valve but I'm assuming it's allready open all the way when idleing and I don't seeing how changing it's position would increase idle. The engine has to get more gas to idle at a higher speed. Is this all taken care of by the ECU? Does it get a "compressor on" signal and cause the injectors to squirt more fuel?






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