Idle Speed and Air Temp/Humidity Options

[StarBear]

As getting ready for the 2022 Northeast Gathering, I'm encountering a semi-recurring idle issue on my 1974 1.8L LJet FI. When outside air is cool and dry, idles just fine at 950-1000 rpm. When outside air is warm and humid, after warmup the idle falls off to barely running. I've just been adjusting the air flow screw (maybe 1.5-2 full turns) to open it. Of course, the reverse happens - if I preadjust the screw it idles near 1800 then settles down to 1100 after the engine gets totally warm (15 mins or so).
I presume (?) there SHOULD be some regulation, perhaps with the ECU or AFM, to monitor air temp and humidity and make adjustments automatically? I didn't have to manually do this adjustment in the past.
The AAR works and tests out fine. Just annoying to have to pull over after running a while and adjust the screw. (IMG:style_emoticons/default/dry.gif)
Your thoughts @Van @Van_B and @Wonkipop ?

[StarBear]

Update: Had a nice 30+ minute run today including highway. Air temp in mid 70s; a bit humid but not yet oppressive.
Car started at 1000 rpm then by 2-3 blocks rose to 1600 (my new seasonal initial preset). After 10+ min idle had dropped but only down to the desired 1000 rpm. Stayed in that mode until after highway and full time.
So, a) tightening the oil filler cap seems to have helped things from being so extreme and b) can live with a minor seasonal manual adjustments until a more permanent problem identification and solution.
(IMG:style_emoticons/default/dry.gif)