This has happened 3 times. The first and second times were about 2 weeks ago on a colder than average day. Had been driving at around 45 mph and I pushed the clutch pedal in and the RPM's went to just over 2000 and stayed there for about 20 seconds while at a traffic light. The next traffic light I came to the car did the same thing. I thought well maybe my size 12 shoes were pressing on the accelerator pedal and dismissed it as that. Then today while driving it did the same thing only this time I heard a kind of screeching sound like a electric motor would make binding up. I punched the accelerator and the noise stopped and the idle went back to normal. All three times it has done this it happens after driving a steady speed and when I depress the clutch pedal. anyone have any ideas?