Hello! My 2005 Prius has been revving very loudly and violently lately when I start the car. Upon starting the car, the electric engine will kick on, and it will start up fine. Afterwards, when the actual engine kicks on, it sounds like I’m driving on the highway at 160. If I leave it on, it sounds like it gets worse as time goes on. I haven’t left it on for more than about five seconds because I’m afraid of the engine blowing up. There are no lights on the dashboard, and the carpet isn’t getting caught on the gas pedal. We had a friend say that it might be the fan that cools down the battery but a) I have yet to figure out how to get the seats off, and b) I’m not sure if that’s the problem, since it only happens when the gas engine turns on and not the electric. If anyone has any kind of experience with this, I’d really appreciate the help! Thank you!