Took a friend for a ride, (if I were Italian, like my wife, that would have an ominous meaning), out on the highway, flying along nice, returned home, positioning to back into the garage, (50 point turn...), while out of gear, the idle suddenly accelerated to 4,000± RPM, (not sure the exact RPM, it was kinda freakin me out), and, despite tapping the gas pedal to kick it down, it stayed up there.
My friend, being a gear head, and former 4cylinder turbo owner (Mitsubishi Mirage, I think), had me shut it off to inspect the accelerator cable for sticking/etc. No sign, started it back up, it was back to normal...
Any thoughts?