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Yes, I now note that wording in the Jetronic Info wiki (I actually hadn't read that before my post, I was strictly looking at green manuals):
Pin 14 ... "Used to keep idling speed constant when air conditioning (A/C) compressor starts."
Pin 15 ... "Used to prepare the CIS valve before air conditioning (A/C) compressor starts."
It's all about preparing for and noticing the start of A/C operation, not during A/C operation, and that makes total sense to me while also agreeing with my own analysis. If the A/C sensing circuitry is involved with your idle problems, I think it would have to be some kind of semi-predictable interference or intermittence coming in on pin 15 to give your kind of symptoms. But your symptoms seem so much more associated with being in/out of gear, so I highly doubt that the A/C circuitry in the ECU is involved despite the magical 200 rpm number and why I pretty much discounted A/C operation being the source for you right from the start (just because you don't have A/C didn't mean the native A/C circuitry already there couldn't be an issue).
Your EZK and the wiring and circuitry associated with pins 8 and 16 smells much more interesting to me at this moment.
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Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now
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