I was driving my 2003 3.2tl type-s yesterday and when I was sitting at the lights the engine just took off. It went to 4000rpm and I wasn't even touching the throttle. I quickly mashed the brakes and dropped it into neutral. It then surged to 5000 rpm. It slowley went back to around 1200 rpm and the light turned green. I put it back in gear and drove it for another 10 miles without having to use the throttle, it drove on it's own and I had to use the brakes to slow down. After I got to a safe location, I shut it off, waited and started it up again. It started nice and sounded normal but now when I press on the accelerator there is a rattle that sounds like a belt tensioner or loose pully. Anyone else have a problem like this?