I finished doing the ASC delete tonight, as well as adjusting my throttle a bit (as it was not quite at WOT with the accelerator fully depressed).

Now, with the car cold or warm, I'm getting what sounds like a brief squeak or whistle that only occurs with either sudden throttle application or sudden throttle lift-off. This noise is momentary, and does not follow with the RPM and is independent of the RPM level (low or high revs). (All of this with the car stationary in the garage.)

I've checked for belts rubbing, vaccuum leaks, etc. Could it be the ECIS intake, now that there is a bit more airflow without the ASC body? Could it be the throttle plate? Any other ideas?

I hate mystery noises.