Disaster999

Sounds like you're just too heavy on the throttle. These cars are very sensitive, so you have to go nice and smooth on the throttle. You also have to do a couple laps to warm up the tires before you get maximum grip. If your radio has exponential, try setting it to -30 and see if that helps. You might also try "sauceing" you tires to get a little extra grip as the tires are warming up.