I tried searching, no luck so far.

After Lucy warms up, whenever I let off the gas and the car returns to idle, the idle dips down, as low as 200-300 RPM before returning to 500 (to be adjusted up tomorrow). I also observed that the first couple times I started her cold after my most recent project, she would stall-out. The 2nd/3rd crank no such tomfoolery. The idle also lopes halfway between cool and warmed-up. This is also IAC misbehavior, no?

Any suggestions? It's not a big issue, the car is still perfectly drivable, but when I'm waiting for a light in the middle of a pack of my cars and it sounds like I'm playing footsie with the throttle...