FiTech EFI system
A little research confirms, cold fuel and evaporation mainly, cold air, cold engine.
IAC is set correctly.
There is also a Crank IAC, which I believe I have close to the max, gradually adjusted over time. The dual quad tunnel ram needed it higher.
IAC is high at start-up, iirc.
I'm guessing here, but I don't see a reason for a high idle as long as the AFR is managed based on the temp.