The only times that I have had idle issues at startup on my GEMS +8 were when the battery was not completely charged. Now I keep a battery tender on it if it is going to sit for more than a few days.
Also, using a Faultmate Nano or similar, one can check the number of steps for the Idle Air CV which should read between 15 and 30 steps. See page 77 of GEMS by David Poole on the GoMoG site.
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