Help please

[Hayes Riviere]

Completely unrelated to the issue, but what year is your Expedition? I noticed yours has a speedometer that goes up to 200, which I thought was kind of weird. My 2013 goes up to 120, but I'm pretty sure the top speed is in the 110-120 range.

 

[ExpeditionAndy]

Completely unrelated to the issue, but what year is your Expedition? I noticed yours has a speedometer that goes up to 200, which I thought was kind of weird. My 2013 goes up to 120, but I'm pretty sure the top speed is in the 110-120 range.

He's from Canada, the scale is in KPH, MPH is the secondary scale.

 

[TJ Toronto]

It's a 2009. And it is in km/h. However, in Ontario, there are governors on them. You can't go over 160 (100 mph) kph otherwise the engine cuts out. Not sure if that's something you guys have as well.

 

[Barjrob1972]

My best guess is that something is making your truck think it's in a 'lost traction' situation and killing power. You need to pull codes first, as Andy said. After that, check for mismatched tires, a locked brake(s) or something in the steering wheel. Even a bad alignment can cause this if your clockspring is out of alignment tolerance.