Friday, October 16th, 2009 AT 9:13 AM
As I'm driving down the road with the crusie set I can hear the engine idle up ever so slightly and the RPM gage moves up a little at the same time (only about a half to one little mark). It's barely noticeable unless you are really listening. Sometimes you can feel it, but again, it's very slight. It only does it at highway speeds. Could it be a bad spark plug, transmission, or something else.
