Any way for you to replicate the fault on the bench?
As you've got two cars would be worth swapping the motor out too just to make sure it isn't that...but only if you can replicate the fault of course.
Is your son the better driver or you? Personally I'd get the B6d for whoever is quicker/more consistent, the B5mCE for the other...but then I'm not a dad and you might well just be being a super dad and giving the boy the better car! : )
One more thought; people who can solve the ESC fault won't be reading this thread due to the title...why not post the ESC fault/specifics to the electrics forum and see what comes back? Couple of people on here who can repair them too.
Do you have low voltage cut off switched on? I'm sure I've read somewhere about big impacts causing this to trigger momentarily on some ESC's? Post it in electrics mate : )
|