Wheel settings, very confused

Hey guys
So i have a thrustmaster 458 spider racing wheel and love using it but on forza 6 i am having a problem which I can’t understand. I have looked around all over the internet and every one is saying to have your acceleration deadzone outside set at 100 but everytime i do that the car won’t go when i am in a race, so i set it to 20 (the lowest) and then it goes fine but after every race the settings reset and the car doesn’t go again i am really confused and i need help please!

Is there pedal calibration required with that model thrustmaster? I’m a fanatec user so I’m not entirely sure about yours. But most wheels when plugged in you should push all the pedals to their fullest so the console and game recognize the range of motion for each pedal so it can set the values.