Acceleration not working properly in nfs heat!

I tried both the mustang and the BMW they give u at the start of the game and neither of them can accelerate at all. I worked up in the mustang and switching the gearbox seemed to work. Then I got on after an update and it was back to being garbage. Even the polestar you use at the beginning of the game is really slow. I saw people hitting 200 mph easy on YouTube while I was struggling to hit 130 mph. It's a really crappy situation and I'm not playing till it gets fixed.