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Originally Posted by BAN SUVS
My RS holds 1200-1500 in neutral when I'm on the highway. I attributed it to the motor attempting to hold idle as high as possible when in gear, but it could be dragging.
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I think this is pretty common; the throttle body bypass will keep the idle up a bit until you slow down below a certain speed, like 5 or 10 mph. Fords do it too.