Hi, i had a issue with my 440 idling. I completely cleaned the carb and re synced them and now it starts right up perfectly. But after running and warming up it idles at 3000 rpm then drops to 1900 rpm and will hold there for a bit then all of a sudden drop to around 1000 rpsm and drop a cylinder. I compression tested both cylinders and they are both at 110.

Any ideas or help would be much appreciated!!