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]

Ok, looking at Haynes page 177 on fig 9.87 current flow 1974 USA part 3: Shows G19 as air flow meter but no temp sensor. Temp 2 CHT shows as G18.
Going to 1975 on page 185 it shows G19 as afm, G17 as temp sensor 1 and G18 as temp sensor II.
No temp sensor I in our 1.8s that I can determine. Will head to butterfly test.
Also found the oil fill cap a bit loose, so that does funny things, too. Tight now.