clean out the junk that is around the gas pedal and then work the pedal back and forth with your hand with the engine off.. This should solve the problem.... if it doesn't than the cable that goes from the accelerator to the fuel injection system might need lubrication. If that doesn't resolve the problem, then the TPS is defective.... (TPS= Throttle Positioning Sensor). Don't drive the vehicle unless you can control the accelerator. If the accelerator is acting erratic, then have it towed to the dealership and let them repair it properly. We don't want to read about you mowing down a bunch of bushes or anything else because the accelerator was stuck....I repeat....... Have it towed..