Well, some success I charged at 3 different CCS stations today. Each of them had the same behavior and the same reported charge port temperature that I suspect is limiting it...
It starts throttling around 170f reported (likely 70f actual - outside temp is low 60s). When stopped, the adapter is still cool to the touch, but lightly warmed at the Tesla end.
I really wish I could get my hands on that replacement charge port. I suspect that the thermistors are different. I'd still want to fix this by tweaking the pull-up resistors in the ECU itself, as that's where the fix would need to be done. That way people won't need to replace their old port to get it working. Just some tweaks to the Gen4 ECU that retains all the necessary safety.
A little birdy informed me that this thermistor thing isn't an unknown issue (thus not specific to my car), and the fix is usually to just apply a fixed resistor offset (on the sensor side) to it to keep it happy. I don't particularly like that solution since it'd defeat the charge port temperature sensing in case of an ACTUAL hot port. Thus I'm trying to go for fixing the circuit at the correct side
More to come! This is my weekend for playing with it.
It starts throttling around 170f reported (likely 70f actual - outside temp is low 60s). When stopped, the adapter is still cool to the touch, but lightly warmed at the Tesla end.
I really wish I could get my hands on that replacement charge port. I suspect that the thermistors are different. I'd still want to fix this by tweaking the pull-up resistors in the ECU itself, as that's where the fix would need to be done. That way people won't need to replace their old port to get it working. Just some tweaks to the Gen4 ECU that retains all the necessary safety.
A little birdy informed me that this thermistor thing isn't an unknown issue (thus not specific to my car), and the fix is usually to just apply a fixed resistor offset (on the sensor side) to it to keep it happy. I don't particularly like that solution since it'd defeat the charge port temperature sensing in case of an ACTUAL hot port. Thus I'm trying to go for fixing the circuit at the correct side
More to come! This is my weekend for playing with it.