re:Vacuum leak tracing

["Peter Webb" <spud66@xxxxxxxx>]

 graham.hilder@domain.elided (Graham Hilder) wrote:

sidedraught Webers or Dellortos, I wonder if anyone can suggest
how one would go about checking for a possible vacuum leak
around the undersides of the carb mounting rubbers, inlet
manifold or gasket ?   
- ---
braden recommends a gadget called a colourtune in his weber
book (an excellent must-own for weber tinkerers).  it fits in the 
spark plug hole and you watch the mixture colour.  one cyl
will come up lean if there is an air leak.  

i think a vacuum gauge in front of the venturi would show
a weak pull too.  use this same gauge for precise syncronization.

hope this helps.

peter

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End of alfa-digest V7 #106
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