OK, I got my timing belt changed at a Mitsu Dealer and I think they jacked it somehow.. I asked the guy what he did and he told me the timing was one notch off when I brought it there and he set it back to normal. I took it back like 4 times and the guy insists the car is fine. I am experiencing what sounds like an air leak coming from the turbo and exsiting the exhaust. you hear a massive blowing sound coming from the back of the car.. I replaced the O2 sensor, the plugs the wires and the cat(put in test pipe)... The problem persists... Does anyone have any suggestions?? I know the rear turbo is leaking oil.. that's about all.. Before I brought the car to have the belt changed it was in PERFECT running condition.. Oh, Did I mention I'm getting like, 15 MPG on the Highway now too? PLEASE if you know anything about this, please help..