caliber 2008

Ok so I just bought a 2008 Caliber sxt. And I'm pretty sure I was sold a lemon but anyway. I just can't understand what's wrong with it. Some days it'll drive good and I won't have any problems. But last week, it started jerking and getting no power or acceleration. Plus there will be a whirring...

I have an 08 Caliber in the Orange color. It was our first brand new car and I had high hopes for this as a little project. Going to be a busy ride for me cause I got issues all over the place. Anyway I'm good to go for now. Just have to find my way around the site. Also have to figure out how...