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Hi, I meant the electrical connection the IACV is composed of two parts, one is the FICD (fast idle control device) which is a solenoid that puts the engine into the "high idle" state by opening a small passage, the other is the AAC (auxiliary air control) valve, this is the valve that is modulated to control the idle RPM. If you disconnect the electrical connection I believe both valves will close (although AAC valve has a thermostatic valve which may remain slightly open). If the IACV is not active and idle is still high there must be some other location where excess air is entering the manifold, either that or the IACV is stuck open. Good luck, please let me know if you figure things out, I'm interested in hearing what the solution ends up being.
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