Have a 1985 EFI truck that sat for 4 years. Went to start it and wouldn't start. Found a mouse nest below air filter. Changed the air filter, replaced fuel tank tank because rusted, fuel filter, open circuit relay, main relay, and spark plugs. When I go to start it, it will run for about 2 or 3 seconds then stop. Ohmed out the air flow meter and all seems fine. Jump the fuel pump and hear fuel running but it just won't stay running. Also when I on suck on vacum line at pressure regulator it will pump fuel. If nothing is jumped, and truck has sat it will run for 2 or 3 second and stop. If I try starting again it will not even start unless I let it sit for 10 mins or so. If I jumper the connector for the fuel pump will start for 2 or 3 seconds then stop every time. Please help!