Wierd that the plug would foul because i would think it would actually run much leaner. With a diaphram thats got a crack there wouldn't be enough vaccum to pull it up, so the needle wouldn't go up as high making it leaner. At least thats what it seems like to me, tho i could be missing something. But the thing that make the slide rise and thereby making a richer mix is the vaccum pressure. If i'm wrong i'd like to hear an explanation because i'm curious.
