Tim,
The symptom for me was a miss that got worse as the coil got hotter.
Initially, the miss only happened at speed. Toward the end, it also happened
while going through the gears. My last ride with the bad coil was a
backfiring nightmare. Like you, I had done all of the normal plug/point
maintenance items.
Unfortunately there's no test you can do for a bad coil (or at least that's
what I was told). All you can do is replace it and see what happens. Make
sure you get the right one for you car i.e. ballast vs non-ballast.
Bob Danielson
1975 TR6
http://tr6.danielsonfamily.org
-----Original Message-----
From: owner-triumphs@autox.team.net [mailto:owner-triumphs@autox.team.net]
On Behalf Of Tim Gaines
Sent: Monday, October 31, 2005 11:32 PM
To: triumphs@autox.team.net
Subject: symptoms of bad coil?
My '74 TR6 recently developed a miss at speed that didn't go away with new
plugs, dwell adjustment, and timing adjustment. It idles steady at 800 rpm,
and removing each spark plug lead causes it to slow, so it doesn't appear
that it is missing at idle. But at speed it goes flat with a noticeable
miss. Does this sound like a bad coil?
Thanks for any advice,
Tim
1974 TR6
1980 Spit
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