Congratulations! Great bit of detective work!
At 12:41 AM 4/30/2004, Steve B. wrote:
>My 74 TR6 stumble problem is solved. I have been chasing this for a long
>time. The list of things I have rebuilt and fixed is very long but I
>never was able to nail the basic problem.
>
>Basically, my stumble problem was when the car was fully warmed up; it
>would stumble and pop in a situation where I would be taking off from a
>standing start such as a stoplight.
>
>As I was studying the problem, I put my timing light on each plug wire
>and found that it was flashing intermittently on two of them. Well
>long-story-short, the problem was related to my Crane XR-700 Ignition
>system. Under the distributor cap is the optical sensor block and it is
>held in place by a metal bracket. This bracket is kind of tall because
>it is designed to allow the optical block to be mounted in various ways
>depending on what kind of car you have.
>
>Anyway, the spark was jumping from the rotor to the top of this bracket
>as it passed overhead. I could tell because of a small amount of pitting
>that was visible. Anyway, I folded over the top of the bracket to give
>it some clearance and now the stumble is finally gone!!!
>
>It is so funny how it's the little things that get you.
>
>Regards,
>Steve
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