ok so i have a 2004 ford f150 5.4l 3v 128,000 miles and im getting a misfire on cyl. 2 under a load. if I take it out of overdrive the misfire goes away. I have replace the coil and then move coils around to make sure they are good. then I change number 1 and 2 spark plug around and still number 2 has misfire. I have just had all 8 spark plugs replace with new motorcraft. I have change the injectors 1 and 2 around and still number 2 misfire. and when im driving around town on flat ground it drive good. i have hook it up to my scranner and when my truck starts missing it shows that coil number 2 turns off or like its been unplug. does anyone have an idea what next to check? my truck is driving me crazy!!! oh and also i have check all the wiring and plugs. i did the wiggle test and all the wiring looks good and all plugs are on and lock into place