Car wont start on cold day. buy new battery, new gold plated terminals, put a few gallons of fuel in the tank wait for a warm day, car still won't start what the hell? What do i do now? Car has been dieing at idle and i can't figure out why. I took it to subaru guy he tells me i have high back pressure and must have a melted cat. it doesn't. but i get a new down pipe anyway now that i sawed my old one in half to see my cat. now this, my damn car has turned into a pos hotrod that has a billion problems that are unfixable and a total mystery to me. what the hell? I just changed the front o2 sensor because it had a cut wire. That was the last time i drove it. It was a snowy ***** out though, but i even took out the air filter just to see if it was full of snow, it wasn't. i feel like i've done every thing and then some. yet i can't get my friggin car to start.please help.