Just cured the very same problem--an irritating miss or stumble at tip in
and always under 2,000 rpm--really prevalent when under load, and fully
warmed up.
Could not get it to go away. This morning I replaced the points and
condenser, the cap and rotor, and cleaned the Champions plugs. No stumble.
My points were slightly burned. I also richened the mixture a quarter turn
thinking that it might be buring a little lean. Didn't take the time to
determine which component was the guilty one--just dumped then all in--set
the points gap at .015", plugs at .025", and reset the timing. Stumble is
gone.
Bill Wellbaum
Las Vegas
----- Original Message -----
From: "Vance Navarrette" <v.navarrette@comcast.net>
To: <triumphs@autox.team.net>
Cc: <6pack@autox.team.net>
Sent: Saturday, September 18, 2010 11:26 AM
Subject: Re: [6pack] [TR] TR6 Mistery Miss
> Might be a bad plug. Just got done tracking down a miss on my
> TR6, replacing the plugs with a fresh set and cured the problem. The
> miss occurred primarily under 2000 RPM, and was intermittent. Noticed it
> most when pulling way from a stop sign. This might explain a whitish
> plug if the spark were weak and/or not there although my plugs were a
> uniform gray brown.
>
> The recommended plug (Champion RN12Y or RN9Y) are resistor
> plugs. I think the resistor in them can go open, causing a miss. That is
> what I suspect in my case.
>
> Champions are currently made in Mexico, and I am guessing that
> the quality may have slipped.
>
> Vance
> _______________________________________________
>
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