Now I have something new to report on my Mark LT

when i turn on the truck on a cold start, and im still parked, the truck vibrates, not shakes, but vibrates abnormally from what i think. when im idling or parked at any other time it vibrates the same, it almost feels like as if the engine is not getting enough fuel and is going to shut off. Ive been reading other message boards and it appears that many people with f150's are having the same problem.

i have only like 1700 miles on this baby, and for being a lincoln, i dont think it should have these annoying issues

thanks everybody, please let me know what i should do, and why these problems with the vibration are happening and any solutions.