[TR] TR6 Mistery Miss

[TR250Driver at aol.com]

Is it possible that a disconnected vacuum retard line @ the dizzy could  
cause the bright white #6 plug.  Noticed that when I pulled the plugs the  
first time.  Not sure if I did it then or it was like that for a  while. This 
line goes to the rear carb.
 
Tested the intake manifold by spraying starter fluid while the Six was at  
idle.  No detectable increase in idle at all.  Afterwards I pulled #6  and 
it was no longer bright white but brown instead???
 
Darrell