i was just looking at my car and trying to lower my idle just slightly. theres a screw on the throttle body that looks like if i were to loosen it, the throttle plate would rise and the idle would go down. but i adjusted the screw following the steps i found online, but now theres just a small space between the screw and the plate. idle didnt lower at all. The Mustang Shop in auburn, wa told me i have to adjust the idle through the computer via tune, but by looking at it, i dont think i do. maybe it just needs some wd40 to loosen it up a little?