my nitro rc car (traxxas jato 3.3) runs fine the only problem is when i turn it on it moves forward. and keeps moving forward at a high speed even when I hit the brakes at full. I tried tightening and loosining the idle screw but that did no goood please please help I have a race in a couple of days and need to be able to come to a full stop and stay stopped even though my finger isnt on the break !!!