I have a 1995 Nissan Sentra GXE with 192,200 miles...I bought it about a month ago from a friend, but I waited on putting insurance on it till now, so it hadn't been driven in a month, but the last time I drove it it drove great. I went to crank it earlier, and it won't start. I opened the fuel tank as if putting gas in the car, and it hissed like a coke bottle, really loud for a few seconds, and I tried cranking it again and it got even closer to cranking, I thought it had, actually. Then it went back to just turning over again. My fuel filter is brand new. The previous owner hadn't gotten an oil change in it in FOREVER, I was actually going to do that today. Could it be from the oil? I figure it has something to do with the fuel, but it could possibly be the fire or the timing chain. I have no idea how to check any of these things though! Please help!