Every once in a while, I’ve noticed that that my cars will shake out of control even before the race starts. I can’t tell why it happens or what stops it. This will continue through the race so I can’t control the cars. Any advice?
Stop drinking and driving!
Now seriously, have you a stable internet connection?
Is this in multiplayer or career/rivals/freeplay? If it’s multiplayer you have network connectivity issues, check your NAT and connection speed, reset your modem/router.