My engine Started running rough recently. Up until that time, the engine had run smooth and was easy to start. After sitting idle for about a week, it started right up but ran rough, like it needed to "clear its throat". I can drive it but it is obvious something changed. I cleaned spark plugs, replaced the condenser, replaced the fuel filter, checked wire connections, disassembled, cleaned and reassembled the carburetor (I believe I cleaned all the ports and passages). I replaced the gasoline with fresh gas in case it had collected some water. The engine starts quickly and idles well. I have not touched the points nor messed with the timing. I am at a loss on what to do next.