re: 2011-2012 F150 5.0 cylinder distortion issue?

I have an '11 w 95k mi and love it. Only prob ive ever had is if I let it sit for a day or so, on initial crank, the entire truck will shake for 3-4 seconds then it will quit. Makes me think the fuel pump might be losing its prime from sitting there. I will buy another f150 after this one.