I also have encountered some of the same problems. My altima started missing when it got hot. I thought that this might of been something to do with the gas. After driving about 5 miles my altima just died. I tried starting it and it would just miss. I took it to a local mechanic and they told me that I needed a new distributor. After paying $500 for repairs. I got my baby back and once the car is warmed up it starts doing the same thing. It putters once the car is warmed up and I press on the gas. It's a 95 GXE Altima. Does anybody know what is going on?