[Healeys] electrical problem

[Dave & M]

The usual. Rotor is shorting to distributor shaft. Microscopic flaw in 
rotor insulation.
D

James Shope wrote:
> this is a new one for me.  driving tri-carb about 30 miles from homedrome and
> it starts to run erractic and finally quits.  lots of trouble shooting finally
> pinpoints area of problem to top of dist cap and rotor.  no spark to plugs,
> however, big time spark with cap off.  rotor is sound but no spark through
> rotor, yet when rotor held with pliers inside cap, spark goes to any contact
> selected and that cylinder will actually fire.  cap back on, no spark to
> plugs.   have spare cap and wires to try tomorrow(had to abandon car at
> daughter's house).  any ideas of the problem?   healeymanjim