> Message text written by "StevesTR"
> >Any spark experts out there? I am left guessing on this one: Everything
> on this TR6 is rebuilt, there are no vacuum leaks that I can find. If I
> put in a new set of spark plugs, my 74 TR6 will run perfectly for about
> 500 or so miles. After that it starts missing at low RPM when under
> load.
Here is a guess. I have read that some fuel additives will cause near
invisible deposits on the spark plug insulators. Some of these can be
electrically conductive. Perhaps using to much lead substitute?
Greg Gelhar
1973 TR6
1980 TR8
Osseo, MN
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