Idle, etc...
On the injected models, the idle adjustment is not on the linkage but instead on top of the throttle body.
There is a 17mm locknut with a slotted screw in the center, clockwise screws it in and lowers the idle, counter-clockwise does the opposite.
Your idle can change if the Auxiliary Air Valve decides to suddenly work, or if you have air or fuel leak (think bad injector spray pattern).
You may need to follow the idle setting instructions in the "best of" if you've messed with it too much. The adjustment on the linkage is only a throttle stop.