The Miata.net Garage links will be your friend: http://miata.net/garage/isc.html
Idle on my 1997 is running around 500 rpm according to the stock tach. I read it should be 800-850. Mine is an automatic (oh shut up!) so when at a traffic light, at this rpm it can chip your teeth
I expected this to require nothing more than a screw adjustment, but I'm reading that you have to short two wires on something, run the car for a specified time, stand on one leg, face North and wave a flag...
Is it really so involved? Moreover, why? Where's the best instructions?
There are 10 types of people, those who understand binary and those who have friends
The Miata.net Garage links will be your friend: http://miata.net/garage/isc.html
It really isn't that hard. These engines aren't terribly smooth at idle so I wouldn't expect much raising the idle slightly.
1997 Miata - Weekend\Autox Car
1994 Mustang Cobra - Garage Shelf
2012 Mazda 3 - Daily