This new-to-me 1.6 tends to idle at around 2k. (It also surges when the RPM is held slightly higher, but that's another problem.)
The adjustment screw is all the way down.
It's slightly lower with the air valve (AV) blocked off.
With the AV blocked, connecting TEN-GND in the diagnostic connector doesn't have a noticeable effect.
With the AV unblocked, connecting TEN-GND will decrease it slightly.
The thing that really gets me, is that spraying starting fluid in the vicinity indicated in the attached photo causes the idle to go DOWN significantly, to around 1k or so until it evaporates.
Also, I'm not sure what A/F is supposed to be at idle, but this seems to idle rich at around 12, sometimes high 11's. Not sure if that matters.
Given the above, any thoughts on what to chase down next? (And why the heck are ISCV's so dang expensive?!!)