Hi
I had 2 cars crash the game when I got to the test tracks. 
After looking at the 2nd car in detail I found that “Drivability” was set to 0. 
I halved the power and the car drivability moved to 5.
Then it set a crap time around the track but that’s my problem.

My suggestion is to incorporate a check for any value that is 0 when it’s required for calculations. If any value is 0 then leave a witty or sarcastic message (or both) but don’t try and do the math. 
Thanks for listening.