Hello all

I own a ATX Fun Factor and i've been having some trouble with it. I'm fairly new to this hobby and i've got into a bad habbit of breaking
my car anytime i can. I've recently had a problem with the throttle. I'll be happily driving my Fun Factor around and all of a sudden it seems
to throttle all the way up and go screaming off anywhere it pleases. I get the feeling it's something wrong that it is something to do with the servo or reciever. I would really appriciate any ideas you have.
Thanks