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Plugged in the stepper motor on the LS1 last night. Previous owner left it disconnected as it revved too high with the stepper motor plugged in. I've since popped the ISC out of the throttle body and fired up the ECU. It's clearly not going back to where it should be- it protrudes slightly. When the EU is powered on, the motor makes a noise and the nipple that controls airflow rotates, but it neither extends or retracts. Is there a way to override it and reset it? I've read up on the ECU Hold Power thing but have no idea how it works. I have the PCLink setup and I'm happy using it.