In a message dated 7/13/2008 7:32:25 P.M. Pacific Daylight Time,
staffel@comcast.net writes:
Well, I have had to replace my TR4's coil several times since 1968. 1st in
Indianpolis going to NYC from Norman OKlahoma in 1970; 2nd in Baltimore in
the
1980's. Typical symptom of bad coil- OK when cold- opens when HOT (99^ day
too). Then in 1999 I put a Mallory Dual Point and Lucas Sport Coil (from
MOSS)-- No problems since except blown condensor (2005).
Sherman d. Taffel
It has been my experience that coils frequently (ALL of mine) fail by
providing a weaker and weaker spark. I once read this and it is the test I use:
spark color
blue-white tops
yellow-white great
yellow -orange not very hot
orange-red weakest
I have checked coils this way for years and have replaced several coils in
my cars when they were low on the list and have seen dramatic change in
performance.
Mike Moore
Brandywine, West Virginia
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