shaking

I bought a used 2012 F150 platinum 3.5 ecoboost a few months ago. Has run perfectly and performed very well up until now. I noticed when I was passing someone it felt like my engine was misfiring. The check engine light started flashing and I slowed down to about 1.5 to 2 rpm and light went off...

Hey guys, so my '15 EcoBoost SuperCab vibrates while gently accelerating/cruising uphill on the highway. The vibration is similar to going over rumble strips (slightly softer though). It actually feels like going over 3 rumble strips only then stops for a second and does it again. This...