ok, i have a 97 lx d16 (auto), i can adjust the idle set screw, which works fine, after the car is warm when in it is gear like at a stop light, the car seems to be shakey, not that bad but just bugs me, no matter how high i turn up the idle set, when in gear it adjusts to lower (shakier) speed, any ideas? I have cleaned the IAC and it seems to be operating fine, is there anything else that controls the idle speed at park or in gear, are they different? Thanks. (replaced the cap, plugs and cleaned the tb 8k ago.)