My friend had this rubber cover come off his pump on the back side (below the AFC and near the full load fuel screw)(between high idle/governor screw and idle screw) and there is fuel spraying out when you rev up the truck. Is this happening because that cover is missing or because of something going on underneath of it.
you can see a pic of it here https://www.turbodieselregister.com/forums/showthread.php?t=73761&page=2&pp=15
you can see a pic of it here https://www.turbodieselregister.com/forums/showthread.php?t=73761&page=2&pp=15