Ok so i have a problem with my stock turbo. When i get on the highway after like third when it s in fourth or higher it shifts and the turbo dies. Boost goes to zero and drown the highway with smoke. Push the skinny pedal and more smoke. The turbo doesn't build.boost. i have to let off the pedal let speed drop and then it will shift and then boost will build. Or if i put it on cruise control it will be at zero boost then after a bit if will build boost. I was wondering if it was the vgt solenoid or crap in the turbo or something wrong getting a signal from the trans? Someone help.