Few days ago my car suddenly got really laud. That day I drove about 60 kilometers on the highway - the car was responsive and everything was fine. Then I parked and left it for about 15 - 20 minutes. When I started it again it was revving like a wounded beast. It seems like an exhaust manifold leak but a big one. The car is Volvo XC90. I would like to avoid Valentine Volvo if possible. Any suggestions on where else I can go to get this problem fixed? Thanks.