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Hi all,
I have a very rich running TR3A where the plugs are getting blanketed by dry black carbon soot pretty much immediately after I put them in. I think it is bad enough that it is at least contributing to a real lag under load. For example if I am in 2nd or 3rd gear and I step on the accelerator too quickly there can be a very distinct and irritating hesitation before the power kicks in. I am going to first try changing the oil in my carb dampers from Marvel Mystery oil to something thicker but it seems pretty clear that I am running very rich. The plugs have a little bit of gloss on the threads but the working area is black dry soot like a coal color. There are flecks of what I can only describe as silver, matches almost exactly the color of the anit-seize I use but is not anti-seize, here and there. All comes off very easily with a wire brush on removal but I am getting tired of removing.
A local store carries the colortune kit where you substitute their colored plug for a plug and are able to determine the correct fuel/air mixture based on the color. That sounds like a much more efficient way of adjusting my needle than turning flats and removing plugs and wondering if I idled too long etc. The main question I have is if the idle mixture, which is what I assume you would be looking at with a colortune, is going to be helpful in trying to get rid of the hesitation that I am experiencing which is decidedly not happening at idle.
The engine idles very well.
Also, I should know, or look this up but standing above the carbs do you turn the adjusting nut clockwise to lean out the mixture?
Thanks very much,
Jim Lee
I have a very rich running TR3A where the plugs are getting blanketed by dry black carbon soot pretty much immediately after I put them in. I think it is bad enough that it is at least contributing to a real lag under load. For example if I am in 2nd or 3rd gear and I step on the accelerator too quickly there can be a very distinct and irritating hesitation before the power kicks in. I am going to first try changing the oil in my carb dampers from Marvel Mystery oil to something thicker but it seems pretty clear that I am running very rich. The plugs have a little bit of gloss on the threads but the working area is black dry soot like a coal color. There are flecks of what I can only describe as silver, matches almost exactly the color of the anit-seize I use but is not anti-seize, here and there. All comes off very easily with a wire brush on removal but I am getting tired of removing.
A local store carries the colortune kit where you substitute their colored plug for a plug and are able to determine the correct fuel/air mixture based on the color. That sounds like a much more efficient way of adjusting my needle than turning flats and removing plugs and wondering if I idled too long etc. The main question I have is if the idle mixture, which is what I assume you would be looking at with a colortune, is going to be helpful in trying to get rid of the hesitation that I am experiencing which is decidedly not happening at idle.
The engine idles very well.
Also, I should know, or look this up but standing above the carbs do you turn the adjusting nut clockwise to lean out the mixture?
Thanks very much,
Jim Lee
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