Over the course of a couple of years my idle speed screw works it's way out a bit. As a result I have turn it in a bit to bump the idle back up. I usually adjust it so the idle "feels" right, and I'm pretty sure curb idle is 600 RPMs(or is it 700? Whatever- it's in my book), but how exactly do you set your idle speed to spec with no wires to connect a timing gun to? I'm sure someone here can tell me how. I'm not worried that I'm running the sucker too high or low, but it would nice to know how close I've been in the past.