Ok, here is my problem. When I start to give my buggy some gas it is fine till about 1/4 throttle then the wheels will trun left then back strait. It will keep doing this on and off till I give it more gas. When I go past about 1/4 throttle I can here my engine slowly reving up so I let go of the throttle and it still will rev up for about 10 seconds. And while it is doing that my wheels will stay turning left.

I turn off the engine and play with it and it works no inerference till I start it up and it will just do what ever it wants past 1/4 throttle.

IDK what is wrong please help.