Quote:
Originally Posted by Custom/Ten
The thing that had me most confused about the idle screw is that when I go to far in/clockwise the tailpipe starts to get a little smoke out of it. You can hardly see it but it looks to be a little bit black. Maybe it's grey, does that make sense/sound normal, is that what happens when you idle to lean? I was thinking that meant it was rich and that's most of the reason other threads were confusing me and why I wanted to start a thread for the Rochester but sounds like it works about the same as any other carb.
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My uneducated guess would be that your running lean. Super lean makes the combustion hotter. Hotter combustion could then start to clean some of the carbon residue out of the chambers. Could look sooty or black out the pipe.
I've seen that myself!