Having issues with my 2005 volvo d12

Related to fuel system I changed the fuel filter housing/ pump prime assembly and the fuel pump it runs when I fuel it but letting it sit for a couple of days in this cold even keeping it idling eventually died out when I came back to work the truck I did have half fuel tank on reader and put antigel in tanks but having issue with air in the system so changed those two parts and proved it starts but fuel not circulating correctly stalls out or pump fuel pedal and doesn't accelerate correctly