redcat rampage

Hi I have a rampage xt that has a throttle problem so when I lay down on the throttle a little bit the engine shuts off could it need more tuning? Please help

Hi I’m hoping to get answers here my gas rc rampage xt has a very high rev I just bought it off someone didn’t know it was accelerated. When I turn it on it wants to zoom away I have to press my brakes on the transmitter for it to stay still is this a carburetor thing?