I posted a note in the moderators section to get Bills attention, hopefully he can come up with a solution for you. Your not the only one who has a issue. Some trucks just don't seem to like the FICM flashes, my Excursion is one of them. However the other trucks run great with the exact same FICM tune. 
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19 F-350 6.7 Auto
16 F-350 6.7 Auto
05 Excursion 6.0, Auto, PHP Atlas 40 FICM, ARP Studs VXBC6(truck PCM)
00 F-350 7.3, 12 Speed, PHP Gryphon, PHP hydra, DAC3
95 F-Superduty 7.3 DI, Auto, Mechanics Truck
94 F-Superduty 7.3 DI, 5 speed, Flatbed
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