Car's turning randomly becomes really slow when driving straight

I’m making a racing game, and i want to build a custom car model because the roblox free car model isn’t very good for what i want to do. I used this tutorial to make the car and i like how it steers but whenever i drive directly straight, the car’s steering just goes really slow, and the only way to make it steer faster again is to let go of W for a second which isn’t very optimal for a racing game. Here is an image of my car (left one is normal, right one is without any decoration, just the base, wheels, and seat)
image
I tried looking on the forums for answers but i had no luck.