That's what sort of noise my Vectra started making today as I was going along. The noise was only there when accelerating though and the torque was nowhere to be seen. OH NO, I though; it must be a blown turbo hose, I've had one of these on the 2.0 DTI but not my brand new baby, surely!
So I pulled in and got the misses in the hot seat, then popped the bonnet and was about to say give it some revs! When I noticed that the hose going onto the inlet manifold had blown clean off!!!! What the hell's that all about? I haven't touched it since I've had the car so it must have been miss fitted.
Anyway, I stuck it on properly and off I went again!