Does it clear up after ~1800 RPM? It took about 3 minutes of a very fast idle and 1/2 can of carb spray to unf*uck my carbs idle circuit. I jacked the idle up just enough to allow it to keep itself idling and then started spraying just enough to keep it running, it finally cleared itself like magic. I had no vacuum leaks. AFR meter will show unburned fuel as high O2 output.
