I have a 2000 expedition EBS 5.4l and i recently had my fuel pump replaced because the truck wouldnt crank so i had it towed and all the mechanic told me was that the fuel pump needed to be replaced. About $400 out of pocket with that repair. Two days later, it takes longer to crank like the starter doesnt want to cooperate and its starting a slight shake when accelerating at low speeds.

Any Ideas?? Please help.