but today it runs like it has bad gas. It idles and accelerates rough but runs fine at 60 to 65. In the past it would run rough for 30 40 seconds when it was started cold but that would pass. When i first noticed it this morning it seemed to cycle from rough to a few seconds of running smooth then back to rough. Very recent cap, rotor, wires, fuel pump/filter and the plugs are not fouled. What might be going on?