OK. I have finally decided to quit pulling my hair and ask for help.
07 King Ranch ccsb 4x4. Studs, Egr delete, 4" exhaust, coolant filter, atlas 40 Ficm tune, SCT livewire with Gearhead tuning, new oil cooler, elc coolant, and fresh T6 oil change. (Issue started before Ficm tune or custom...