Driving to lunch last week, my NX started to bog and cut out. About half a mile later, it died and wouldn't restart. It cranks, but won't fire. I pulled the plugs, they were soaked in gas and black. I checked for spark, and the plugs are getting spark just like they should. I pulled the fuel pump fuse and cranked the car for a bit, and it started and ran for over a minute before it died. I put the fuse back in, and it wouldn't run. Fuse out, it runs for a bit and dies. I thought it might be fuel pressure related, so I put a fuel pressure gauge on. It reads 35ish before I pull the fuse. If I shut the car off, it holds pressure for long time, it even goes up a few PSI. What is wrong with my car?