I have a 04 f250 06 deisel with 66,000 miles. Just drive on weekends and during hunting season. Bone stock just a cat back mbrp exshust. I had to replaces the ficm about 2 years ago and thats all i have ever had to do been a great truck. Now the issue after I drive the it for a while like 15 to 20 min it starts missing when I take off from a dead stop or when I gear down and make a turn and go to take off again YES its a 6 speed trans. Where should I start. I use all motorcraft filters and oil and change oil every 5000 miles. Change fuel filters every 2 oil changes. Seems to be wores when fule is under a 1/2 tank or closer to 1/4 tank. Unless its just a quinsadens.