I have a 2004 Nissan sentra ser spec-v 2.5L that has 165,952 miles on it and it has been a really reliable car until recently. When starting it acts like it is going to die. Yesterday I was merging onto the freeway and the car died. The hazard lights were still working but it took a few minutes before my car would start again. I've changed all of the spark plugs and wires and the throttle position sensor as well as the crank shaft sensor and the check engine light came on after it lost power on the free way. The diagnostics tool gives a code that says cylinder 3 misfire. When I took a live data scan it showed the "Fuel sys 1 CL", the SHRTFT1 jumps from 1.6 to 0.0 to -1.6. I noticed recently when I start the car there is a gasoline smell and possibly antifreeze smell coming through the vents. I am truly at a loss as of what is going on so if anyone has any suggestions or advice I would greatly appreciate it. I'm at the point where I'm about to give up on this car to try to find something more reliable. I care for my elderly Grandmother since my Grandfather just recently passed away and I absolutely need a reliable vehicle in case of an emergency.