I've got a 2000 with 212,xxx miles on it. Recently I've been having a problem with it intermittently running rough. It does it whether idling or under load and has very little power while running rough. Then, out of the blue, it will start running fine as if nothing happened. The engine temp doesn't seem to make a difference, it does when the engine is cold and after it's warmed up. I had to codes read and none showed up. The MAF is only a few years old. Has anyone experienced something similar and if so what resolved it?