Hi guys, I am having a issue with my 99 7.3 automatic. It recently has been having a high idle when its in drive. It does this about 50% of the time when I drive, and as soon as I throw it in park, the idle returns to normal. It also will sometimes have a rough idle and will die randomly only...

04-350-6.0-170K-100% stock Has had an intermitent what feels like a miss for 16 mos. 1st dealership trip replaced EGR,EGR cooler, oil cooler, couple of injectors. Dealership trips 2-6 replaced EGR 2 more times and reprogrammed/updated the computer. Tried another dealer for trip 7 and only...