[saintly]

I had a simular problem with the idle while the car was moving.
i.e. stop on a hill (pointing down) with the car out of gear and idling normaly (aircond off). let the car start rolling down the hill. does the idle start bouncing down to allmost stall and up to about 1,000 revs?
if yes then that's what mine did too. a simple adjustment of the idle screw (on the throttle body) to bring my idle from about 500rpm to about 600-700 rpm fixed it.