My X5 Stalling Problem, Running Rough PLEASE HELP

[icexx99]

2001 BMW X5 4.4L
So 2 months I got the P0171, P1341, p1343, P1345, P1349... I replaced the left side camshaft sensor and it fixed the problem but I bought an aftermarket one, once and awhile I get the P0171 code but I need to replace an oxygen sensor I believe because I dont see any air leaks and I checked numerous times...

So yesterday I was driving home and I was almost home and every time Igave it gas the car kinda like felt like it was going to stall, I pulled over shut it off for a moment restarted it continued to drive home no CEL,
About 2 miles away from my house the truck did it again except this time the CEL came up and flashed so i pulled right over, luckily I had the scanner in my truck I got the P0171, P0174( bank 1 and bank 2 lean oxygen sensors)
P1341, P1343, P1345(multiple misfire ,cylinder 1 and 2 misfires)... I got the truck home after it sat for a half hour, driving 20mph with a steady CEL not flashing.
I figured Im going to narrow the problem by swapping the Coils to cylinders 3 and 4 and swapping the CPS's.... Now the truck starts fine when it warms up it runs a lil rough then stalls, if you try and bring the rpms above 1500rpm or give it a quick spurt of gas the truck stalls NO CEL.... PLEASEEEE HELPPPP Im guessing it can be the Fuel Pump or Fuel Filter thats all I can think.. Any