Bandit216
Well-known member
The key point here is your battery module swap. (Most of your replies are just describing the normal temperature limiting.) I got my truck back after a battery module swap and had to immediately schedule a return appointment. Here is the written description I supplied to the service department when I returned the truck:
"Severe Power Limitation - Immediately after picking the truck, and as soon as I turned on to the Steese Highway and started to accelerate, the acceleration dropped dramatically. When I checked the available power (as indicated on the upper left quadrant of the left hand gauge of the driver's display ) it showed only 76% power available. Further attempts to accelerate up the Steese Hill on the way to CHSR resulted in even lower available power. At one point the gauge was showing only 19% available power and, even though the accelerator was floored, the truck could only go about 45 mph. The available power fluctuated up and down the rest of the way home but never returned to the 100% level where it always indicated before the battery module was replaced. After charging at home in a heated garage I regained 100% power for a period of time. However, after stopping in North Pole, I restarted the car and the power limit returned as soon as I tried to accelerate from the first stop light. That cycle of regaining 100% power for a some variable period of time after charging, then becoming power limited, is still occurring."
There are threads describing an "up to 30 day" period for your battery BMS to relearn the correct capacity and associated limits, but after three weeks I have seen little change. The 19% power limit I received is not something that should be acceptable to anyone receiving their vehicle back from servicing.
I'm guessing it is a simple case of a recalibration procedure that didn't take, but I should know more after Ford service has had the second chance to look at it.
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