What if any are some design or engineering flaws to beware of?

What if any are some design or engineering flaws to beware of? - 1

Added (1). For a 2010 Ford F150 SXT Regular cab.(shorty)

Added (2). For example the 2006 ford expeditions have that spark plug issue.(they break often in head)

Added (3). I'm thinking of purchasing a 2010 F150 sxt regular cab automatic 4x4, 8cyl, and was just wondering what to look out for.

2000 ford expedition shaking bad?

Hello this is my first time posting, so you have a 2000 ford expedition and it shakes really bad when doing 40 but when I'm going 55 -60 it gets better buy if you slow down it feels like I'm in an earthquake and when I'm doing 20 or under it doesn't quite shake but it does feel like a wobbly tire or something and I also want to add that this has slowly getting worse. Thanks for any information, I ha'email an appointment in a couple days at less swabs.

What causes Ford Expedition to jerk while accelerating?

I have an 07 Ford Expedition that jerks when you push the accelerator about half way down. You can push the accelerator down further and it usually stops. At first, I thought it felt like the transmission was having trouble getting into the right gear. So I had that checked out and was told that the tranny was fine. Next I tried replacing the fuel filter, but it still jerks. I had a mechanic run the codes and found nothing. Any ideas what it might be? It doesn't seem to matter what speed the car is at. It's more tied to the position of the accelerator pedal.