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Well, its quite simple. The Idle control is NOT hooked up to coolant. The IACV is hooked up to vacuum at the rear of the manifold, and then in front of the throttle body.
Your pictures are horrible. But if the coolant is looped leave it looped.
Yes you can run the car without coolant to the throttle body. You "can" run the car without an IACV if you adjust the idle via the throttle plate; IE cracking it open making your static idle higher. However your car will be a bitch in cold weather.
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