Expy Lugging and lurching

[Evan D Dailey]

I have a 2020 King Ranch. Love the car but have continually had an issue that appears to have gotten a little worse,
While accelerating, the car seems to lurch forward, and then back, very quickly. It is subtle, but noticeable. Seems to be worse when the car is cold.
Your thoughts are appreciated.

 

[2020FordRaptor]

I have a 2020 King Ranch. Love the car but have continually had an issue that appears to have gotten a little worse,
While accelerating, the car seems to lurch forward, and then back, very quickly. It is subtle, but noticeable. Seems to be worse when the car is cold.
Your thoughts are appreciated.

Is it under hard acceleration? You know cold engines don't like being pushed when their cold. Take it to the dealer, it's still under warranty right?

 

[Deadman]

coil packs

 

[Evan D Dailey]

Not hard acceleration; normal gentle acceleration. When I say the engine is cold, I mean during the first 15 minutes of driving. It still has the problem when warm, but perhaps a little less.
I have taken it to a dealer; they could not find anything at all. I am going to take it in again.

 

[LokiWolf]

Not hard acceleration; normal gentle acceleration. When I say the engine is cold, I mean during the first 15 minutes of driving. It still has the problem when warm, but perhaps a little less.
I have taken it to a dealer; they could not find anything at all. I am going to take it in again.

How many miles? Plugs ever been replaced?

 

[Evan D Dailey]

13,000 miles.
The car has done this from day 1.

 

[LokiWolf]

13,000 miles.
The car has done this from day 1.

Have they done any software updates to the Transmission? Have they run it through the relearn procedure?

 

[Evan D Dailey]

I am not aware of any updates they did or the relearn procedure, whatever the heck that is.

 

[LokiWolf]

I am not aware of any updates they did or the relearn procedure, whatever the heck that is.

The Transmission is smart. It learns. Sometimes forcing it to learn will make it forget a bad behavior, like slipping the clutches or other things that can cause what you are describing. There are also updates that have been released to its code since your Expedition was new. My suggestion is take it back in and ask for them to apply any available updates for your VIN in FDRS(Fords diagnostic system), and to go through the relearn procedure.