I bought my Mustang about a week ago. It runs great for the most part but there are too little problems I am having. The first as that when I come to a stop it shudders slightly, kind of like it wants to stall but never dies or idles too low. I dont know if this is normal but I hope its nothing big. The other thing is when I'm going up steep hills it shudders as well. About ever 5 or 6 seconds it does it. It dosent do it all the time but every now and then. Other than that it runs great. Its a 98 V6 auto, stock, if that helps anyone.