This is scary stiff, taken from a NHTSA report: Be carefull
Driving home from work, I experienced a sudden uncontrollable surge in acceleration causing my speed to increase from about 60 mph to 80+ mph.
Immediately I began to brake hard as I was rapidly approaching traffic just ahead of me. Fortunately the inside left lane was unoccupied and I was able to make an immediate lane change. Initially I depressed the brake pedal as hard as I could using both feet but only managed to slow the vehicle to 40-45 mph. With my speed reduced, I alternated between pumping the accelerator pedal and pulling up on it from the underside with my right foot as it became clear that the throttle was stuck in an open position. The vehicle continued to speed back up to over 65 mph with less pressure on the brake pedal.
With traffic just ahead of me, I moved over to the left shoulder next to the center barrier and continued to try to release the open throttle. There were clouds of smoke around the vehicle and the smell of burning materials from the overheating brakes. After finally getting the vehicle slowed down to about 25-30 mph, I shifted into “Neutral” and depressed the start/stop push button a number of times hoping to stop the engine but nothing happened. Instead the RPMs moved up into the redline range on the tachometer. I quickly shifted back into “Drive”; the vehicle jolted and rapidly accelerated to 60+ mph.
As the brakes were fading quickly, I was certain that I would need to shift back into “Neutral” and let the engine blow up to stop the vehicle. Suddenly the acceleration surge stopped and I was able to bring the vehicle to a stop about 1 ½
to 2 miles from where it had started. I quickly shifted into “Park” and depressed the start/stop push button to turn off the engine. The vehicle seemed to shutter as I did so. Upon restarting the car, I drove cautiously to Lexus of Wayzata a short distance away fully prepared to shift into “Neutral” if the acceleration repeated.
The car remains there over 5 weeks later.
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