[Overtime]

The most immediate thing that comes to mind is the fuel filter and pump, which you have just changed. I would recommend checking the spark plugs first to make sure they are gapped correctly and not fouled. If they are, there is a reason. You should check the injectors. I was able to pull my fuel rail off without disconnecting the injectors from it (3 bolts). Lay them on a large piece of cardboard and test the spray(mine was 2 foot by 3 foot). Also check the o-rings while you have them off and replace them is they look burned, melted, or torn. If you have a Hayne's or Chilton's guide, verify the ohm reading on the injector(unplug these one at a time!). You can also pick up a 'noid' light($6) from autozone to test whether you are getting electrical signal to the injector.