Hi I am new here, and this is my first post. I bought a 2004 CC 4x4 F350 a week ago used, and it has right at 144k on the ticker. It was running great when I got it, but starting yesterday it has developed a shudder. It only does it when I hold the throttle at a constant speed, and when it starts to shudder, I can step on it, or let off, and it will go away. It also feels like it has a lot less power, and the fuel mileage has dropped off a little as far as I can tell (only had it a week). Looking for advice. From what I have read here it sounds like it could be a bad FICM or Injectors, but I need to know what I need to do as far as figuring out where the problem is so that I can fix it. I am ready to start using this truck for towing, and was hoping to make a trip this coming Wednesday to pick up a jeep.