Help!! X5 sputtering

[04e53x5]

Hello again i was on my way to a friends house the car was driving fine then it was feeling a bit shakey and then it was sputtering i pulled over it revs and idling fine so i continued on and it did the same thing again so i turned around and started to go home. as i was getting closer it was getting worse. i thought it would be either the maf or the coil pack i just replaced the maf so i know it wasnt that so i was thinking its a misfire and a bad coil pack but i checked the codes and all igot was p0313 which is misfire on low fuel. so now im stuck
any help would be awesome
thanks gio

the fix-- main fuel pump and fuel filter