I've been doing a lot of work on my battery and electrical system this past week. After I finished I went and tried to start my car, it started but only ran for about 6 secs before sputtering and dying. I have a brand new fuel filter so obviously the fuel pump is not pumping fuel in or something. I checked all the fuses under the console and under the hood, not one is blown. Weird thing is I can start it and it will run for about 6 secs, one time after another. Which means theres a little bit a fuel getting in in the beginning but somehow it's not gettin anymore. Whats goin on?