My 1972 Newport 400 ci. I just had new axel bearings installed, and manually adjusted the brakes. Just to be sure that they were right, I drove to an alley, and backed up hard, and then hit the brakes to adjust them. It already had an exhaust leak, maybe it's related? But the second time I did it, the exhaust pipe moved, and started tapping against the gas tank. I already moved it back. Now after that, it kind of "coughs" When idling it is normal then a quick "cough" then the speed comes...
Stumbling after rough acceleration.
