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/wwwthreads_images/icons/crazy.gif You have to understand that even though we have used carbs since before the Model T days, that carbs are imperfect in that there is no linear relationship between the air that passes through, and the amount of fuel drawn in. It's tough, but it's true, and always has been. That's why fuel injection is so darn much better, it has the perfect potential relationship, and is being constantly adjusted to stay perfect. In carbs, all sorts of little tricks and devices are built in to compensate for the diference in mixture caused by the non-linear air/fuel relationship. Because of that, there are often transitional thresholds of airflow which trigger the adjustment in mixture. When the change occurs, it in itself is imperfect, and often causes a "flat spot" in the power output versus RPM. If the engine is doing that with fuel injection, then one or more of the sensors is not reading and reporting just right./wwwthreads_images/icons/frown.gif There...I got it all in print...Whew./wwwthreads_images/icons/tongue.gif

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