Posted by Dan on March 13, 2005 at 18:12:03 from 81.77.133.76
When it gets down towards freezing my 528i runs rough when cold and needs a bit of extra throttle. I've checked for vacuum leaks, new bellows, the cold start valve squirts fuel. The aux air valve opens (when put in the freezer) and closes, but it only opens about a quarter of the way at most. Could this be my problem - should it open more than that? TIA - Dan