I previously owned a 2017 Raptor that had all kinds of issues and now I have a 2019 which runs great except for when it is cold (my 2017 also did the same thing). I have never had a vehicle drive so different when cold verses warmed up. The acceleration and shifting is horrible. It doesn't matter if it is 40 degrees outside or 90, you are in for an interesting ride until you have gone a mile or two. I know cars/trucks will shift at higher RPMs until they warm up, but what I have experienced with both of my trucks can honestly be embarrassing if you have a passenger. Other posts have mentioned having the dealer update the programming, but my 2019 should already have their latest algorithms applied. I can't be the only one experiencing this problem. Do I just need to let it warm up? If so, for how long? Any other potential cures?
How quickly after starting the vehicle do you take off?
What spark plugs are in the truck?
A lot is going on when cold starting a vehicle, below are some conditions to name a few:
-Once started, the truck will attempt to go closed loop as soon as possible(when o2 temps and time delays are satisfied) for greater control over emissions.
-AFR is a tad bit rich on startup for stability.
-Oil is slowly heating up reducing parasitic loss and friction when compared to start up.
-Internal clearances in the engine are expanding from heat, so oil pressure marginally decreases until up to full operating temp.
-Engine coolant temp is rising thus ignition timing is changing(as cylinder temps increase).
-Trans, transfer case, and diff fluid are all heating reducing parasitic losses and changing viscosity.
It is a balancing act to account for so many quick changes in such a short time, and to have the vehicle drive nicely.
You can check if there has been a firmware update already for your vehicle at the dealer, and perhaps that could be of benefit. We've had in house trucks that had firmware updated before we tuned them and it did make a difference in some cases prior to tuning, but those were 17s and 18s.
You also could perhaps try letting your truck warm up for 1,5, and 10 minute intervals and see if/when it seems to be happiest when starting off.
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