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Probably disconnected the idle control valve. It must be getting power since it's "doing" something when it's disconnected. The power comes from the OVP, so we'll assume the OVP is supplying power. The engine control module provides the ground for the idle valve. Possibly this wire is shorted to ground and opening up the idle valve. Or for some reason the engine control unit THINKS the engine needs that much air, OR the idle valve itself is bad, which is what I would suspect #1. If you know what you're doing, I'd disconnect the wire connector from the idle control valve, and then the harness from the engine control module, and see if the ground wire to the computer shows a short to ground, if not I'd really suspect the idle control valve is junk.
Gilly
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