Hey guys and girls
I have a 06 HHR that has a loud idle and acceleration. It has been like that since i bought the car a few months ago. My thought is i need to change the exhaust manifold but i dont see any holes in it. Then I thought it could be the cat converter that needed to be replaced but I don't see any external hole in the cat either. Is there something I'm missing or am I diagnosing the wrong parts. Please let me know what I need to do. Thanks.