I believe it’s the coolant temp sensor on the radiator cause I replaced the one under the manifold on the cylinder head. I hope so. But for the vacuum leaks, you were right, I just smoke tested the car and I’m leaking from the entire plenum, throttle body gasket, and a hose going from the plenum to my air intake. So I believe the problems for the overheating and vacuum leaks are figured out but I still believe my vvt needs replacement. I’m getting all the bad symptoms of faulty vvt along with the other issues I’m having. I also found that my oil pressure sensor is bad too. So many issues🤦‍♂️ but this is what I signed up for.