Hi there everyone
Been racing with the v3 pedals for over a year now and in Iracing the brake rubble works every now and then and then nothing.. As for the throttle rumble there is no support for the simulator at all.
I race with rfactor2 and 1 and raceroom and it works everytime.
I load up and do all tests like you do from the start up of the pc to tests in all profiles with fanatic and fanaleds but in Iracing nothing.
I hope this helps.