I have a 06 cobalt LS 4 door car. I have had it two weeks and I've already had to put money in it no used car is perfect I know lol. Any way I've already had to do a break job get a new battery new ball joint tire rod new oil pan as well and now I have to take it back in for the dipstick tube the guy broke it when he put on my oil pan eye roll any way when I turn the ac on it idles rougher and now when I turned her over to move her she died twice I was thinking it's a vacuum leak or something but I'm not sure. What do y'all think? I haven't had issues with a car like this before.