To be honest the car just freaked out and would only go like 10mph. It surged when it idled I think. Let your car run for 10-15mins just at idle and then see if the TB is super hot to the touch. My hose bent around the electronics part of the TB and would heat the whole thing up. Sounds a lot...
This is gonna sound so stupid, but check the clearance for the coolant hose that runs from the water neck you swap out to the over flow bottle. Is that touching the TB in any way? If so, extend that hose so it doesnāt touch the TB and then put some reflective heat shield on the TB electronics...
Do you have a 2018+ VMP twin jet 69mm tb? If so, then itās programmed for the 18+ cars. Something is probably messed up in the throttle body. Have you seen any codes or data logged it for the tuner?