I have a 2003 Toyota mr2 spyder, and when I press on the gas pedal hard, as if trying to accelerate quickly, the gas pedal sticks and the engine gets stuck revving up, and it won’t quit until I turn the car off, or switch gears, but that does not always work. I was driving down the highway today and press the gas pedal to accelerate to switch lanes, and it began to rev up and would not quit, even when I switched gears. I had to pull to the side of the highway and turn the car off to get it to quit. The engine was obviously smoking at that point. Please help!