Thanks for suggestion. After thinking about it further, I don't understand how that can cause a rough idle. The pressure in the fuel line should be constant and the injectors would seem to determine when the fuel enters the cylinder.

The rough idle I'm normally experiencing seems to be related to the outside air, as I only really have a problem if it's cold and damp or if the wind is blowing while standing still.

The question I had was that the engine became erratic when a breeze blew while the air cleaner was removed. I can possibly understand how it could happen, since a breeze could be causing a vacuum and drawing air from the engine. This is just theory trying to explain observed behavior. The real question is this normal behavior? (I don't remember having this kind of problem with a carb.