Rough idle/no rev problem

[tada]

I stepped away and tried to think about this. I found the plugs in cylinders 1, 2, and 3, which have no miles on them to be covered with soot. So I smelled the oil dipstick and found it to smell like gasoline. So, I replaced the fuel pressure regulator. The result was the same, rough idle, missing, dies when given any gas. But it does run longer now. Also some white smoke came from the exhaust. So at this point I guess I move on to the injectors and a lot of disassembly to get them out. While I'm removing pieces, it should be an excellent time to clean and check every fiddly piece for leaks. Any advice or encouragement would be appreciated.