1997 Ford Mustang car starts and runs for about 3 seconds t

I own a mustang cobra. The car has been sitting in my garage since with alittle less then a quarter tank of gas since june of 07. In october of 07 I decided to start the vehicle it would start and run for about 3 seconds then die I knew that it had to be a fuel issue because the battery was brand new and I had hooked up to my battery charger before I tried to start it, so I went to my local car shop and explained the problem and they told me that there was water in the gas, so I picked up some gas anti freeze. I put that in the tank and started the car a couple of minutes later. It fired right up and ran like a charm I drove it around the block then parked in the garage again. Just yeaterday I tried to start it again, for the first time since october, same exact problem. I went and picked up some more gas antifreeze mixed it with a gallon of high octane gas and put it in the tank. Still would not start. I live in columbus Ohio its very cold right now. I thought maybe if I warmed up the garage with my kerosene heater that that would help, it didnt, Im stumped. Keep in mind that this car is pampered only 58000 miles, its a DOHC 4.6 liter, very clean engine. Everything is stock except for the whole exhaust system headers to tips no cats. The fuel filter is fairly new also. I dont knoe what else to do. Please help!