I have no idea what could cause this. When I'm driving and I have my a/c running, my car 'sputters'. You can defintely feel it near the muffler. It doesn't happen when the a/c is off. I had my g/f hit the gas and I checked the muffler and everything seems to be in order. What could be the problem?

 

The AC will bog the engine down. I have never heard any different noises, but you can deffinately feel a difference in the power of the car with the AC running.