hi guy having a hard time with my port 5.0 mpi Engine I can’t tell if I’m having an air problem not getting enough gas or that has something to do with the tank and the built-in in line pick up tube. I changed all the fuel filters and fuel pressure regulator’s and the cool fuel pumps seem to be working fine so I’m lost. The engine starts for a minute and then seems to not either get fuel or run strong enough then shuts off . the week before it ran perfect so I’m lost The gas is 2 years old but I add booster and added a lot of new fuel and runs fine specially for the other engine ??????????