silverbullet2004

hey there, new to the site. Found it by searching for some help with a problem i have with my chevy , great site!!!!!!!. Anyway i have a problem with the injectors being dirty . Ive taken 8 of them out 3-4 times now and including the fuel rail and cleaned that to. My problem came from a hole in top of my fuel pump which i had to raplace my pump and clean my tank out. Since then i blown the fuel lines out with air from the rail back on threw the truck towards the pump disconnected of course. I kept doin that until i had no dirt comin out of the line. Ive since had to clean the injectors again and again after this. Where could the dirt be coming from now?? Tank was sealed good at the pump from when i reaplaced it with a new one. \where else could there be dirt comin from????? .... all help would be great thanks!!!!!!