One problem related to car throttle stuck has been reported for the 1997 Porsche 911. The most recently reported issues are listed below.
Engine raced to 4500rpms from 1000 rpms and did not idle after pulling off the road. Driver turned the ignition off, restarted and the engine raced to 4500rpms. Driver inspected throttle and it did not appear stuck. He believes it maybe a computer glitch.