fuel pump malfunction; white smoke outta exhaust

i have a 2001 supercharged ford lightning with aprox. 63k miles.(430rwhp & 530tq.)engine wise i have 3stage sct tune, longtube headers, high flow cats,tranny wise i have 2200 stall and shift kit. a while back it started blowing out white smoke on 1 occasion and missin and jerking like it was gonna cut off, and i took it to the shop and they said it was the injectors,so they cleaned them and it stopped for about 4k miles. i rarelly drive the truck and every other day when i start it, it blows a puff ofwhite smoke from the exhaust for a second( i figured unburned fuel?) well the other day my check engine light came on and read a; fuel pump primary mal function and fuel pump secondary mal function, system lean bank 1 & system lean bank 2, i fanished driving it home after wards and about 10miles from home, it started jerking and blowing out white smoke. now im lost looking for clues where to start. anyhlp would be nice!!