Is my car missing because it's lean, or something else.

[dtowngoalie]

Sometimes when I bring my car to a stop in neutral it doesn't like to idle very well, the wideband reads ---. Other times I bring her to a stop and she idles perfect. I'm not sure if I'm trying to hunt down something causing a missfire, which is making the car appear to be lean becuase of the extra air. Or if it's just running lean at idle and causing the miss. Usually a quick blip of the throttle cures the missfire and it will idle nice after that.