Popping sound in exhaust

Water temp is just about 190*. Purhaps "load up" is not the right term. It was running supper rich and fouling the plugs (gas fouled, not oil fouled) and putting out black smoke. I'll check tomorrow with the vcan hooked up to the sparkport and see what my total advance is. Thanks for the input!:thumbsup:
At idle? Then something is wrong.