can i sure a dealer ship for a defect car

You can sue anyone for anything but you have the burden of proving your case.  Without a warranty, I am not sure what your options for recovery are without seeing all the paperwork that you signed and/ or recieved.  Were there other problems with the car? Did you get a carfax?  Was it a certified used vehicle?  There are not a lot of attorneys who take cases like this.  I would mention Daniel Blinn in Rocky Hill and Sergei Lemberg in Stamford.  Two different ends of the state.  They are both very good at these types of matters.  Feel free to contact me as well for more information.