My truck threw a P299 code a few days ago. I have the Torque app and have been watching the boost closely and sometimes it's fine and other times it will only build up to 6psi. The truck is sluggish when it won't build normal boost. When it's not normal I hear a chirp or hoot when I easy of off the accelerator pedal. I've checked all of the "vacuum" lines going to and from the wastegates and wastegate solenoid and they look fine. Is this a BOV, wastegate or a wastegate solenoid issue?