Anyone know what would cause the hot idle to not drop to it's initial setting when the throttle is released (300 RPMs too high)? Blipping it always brings it back down, as does switching off the ignition and restarting. No amount of fiddling with any of the linkage lowers the idle, and the teapot was recently cleaned/rebuilt. Performance fine otherwise. Not a real problem, just curious.

6 VOLTS/POS. GRD. NW INDIANA