I do not have air care where I live, If, indeed I do have a bad cat(s) can i run without one? I really don't want to sink any money into this car. Its also throwing a P0193 from time to time and I just bought new headlights which i haven't installed yet and I am putting on new tires on the back tomorrow...being AWD they should be the same size!!! What tire shop would do that?!?!

 

Most likely a vacuum leak. I get that coat all the time and I’ve got a very slight vacuum leak