Hissing sound when accelerating
I have an 06 2.4 5 speed, recently a new noise appeared, it makes a hissing sound when I am accelerating, it gets louder when I accelerated harder. Is there a cure for this, and what is it? There are no engine warning lights on, how can it be diagnosed? It has not changed the performance or mileage. Anyone else out there had this annoyance?