Hi, I have a 2003 A4 3.0 Quattro 6 speed. I have recently come into an issue where when I try to accelerate and put moderate to extreme load on the engine, my RPMs jump, the car shakes, and I hear a loud whirring vibration sound. I just recently had one of my camshafte position sensors changed and I only noticed this issue following this repair. Is is possible that the shop I tool it to could have loosened a tensioner or something that is causing a belt to slip?

Thanks
- Connor