Mine was leaking coolant and, like you, I didn't want to have to pay for a new part, so I chose to take mine apart and see if I could refurbish it. Be very careful taking it apart, as there are springs and little bits that like to jump out at you. I ended up losing a piece at first, but there are a few pictures around Google of what the internal bits look like.Just curious how many owners have replaced this part, which costs something like $ 800.
A perfect idle is nice to have, but not necessary if the car runs well. My car wants to idle around 1500 rpm,
and I have the idle control screw completely closed.