one cylinder running colder than the rest.....

[wagonman]

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If there are other problems, such as a miss, exhuast smoke, ??? then you may have a problem, but 100 degrees does not sound like much to me. The reason I say this, the amount of fuel or lack of it each cylinder receives affects the temp, which means for all cylinders to be the same
temp, the carb/intake would have to be suppling the same amount to all cylinders, which is is ideal, but nearly impossible, especially at idle.Besides fuel, the other thing that can easily affect temps is valve settings.


We check temps, but are looking for a "cold" pipe, which means a cylinder is not firing. As long as they are all heating up, and no other problems, good to go.

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I agree with this post!
If you were racing it and wanted to run right on the egde of lean,and that 100 degrees brings you over the top.then i would investigate.

If you just cruise and the car runs great with no other apparent problems i think your good to go. 100 degrees doesnt seem alarming....