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]

Second test run for 20 min done.
Pins 6-9 at 324 ohms before starting. At end ohms varied widely, 961 to 1005 to 324 to 201 about 20 secs apart. Sometimes no reading at all, even after relearning pins.
Pins 8-9 very steady at 154 and 164 ohms, as before, about 20 secs apart.
Idle Behaving better but still not to my satisfaction. Looking at replacing the TB gasket. (IMG:style_emoticons/default/dry.gif)

[nihil44]

Apologies to the group for posting photos of what I believed to be the AFM from a 74. @Van B alerted me to the possibility that the photos were incorrect. I believed it to be a genuine 74 AFM as that was the AFM that came on the car when I got it.
I popped the top of the AFM which is on the car and indeed it is quite different inside. I don't know where the other AFM came from as the black plastic cap bearing the part number has been lost. Updated photos below. There are 2 black wires coming from the position of temp sensor ‘1’
I looked up PET and the change over point for the different AFM and ECU is the same – engine # ECO 037 551. 6 to 7 pin change over. No surprises there