Ok, check this out. In the past I've posted questions here on how to fix my tachometer because it only works every now and then. I was never able to fix it. Something new is happening now. When the tachometer is not working and I'm at cruising speed it feels as if the engine loses power then gains it back. It's hard to put into words. I'm going along and I swear I feel a loss of power almost like a light buck from the engine. It's noticeable is about all I can say. Anyway, when the tachometer comes back to life the symptoms I've described go away. What's going on?