Vacuum motor control systems are slow to react sometimes. A lack of proper vacuum supply (due to a leak) could make it worse. There is also the possibility that the peice on the back of your knob is cracked (blue plastic that slips over the posts). Check the back of your knobs and check for vacuum leaks. I justed noticed you said over a minute, so something isn't right. Those are the two things I would check first. One common place for a vacuum leak is the rubber elbow on the end of the plastic line at the lower portion of the intake manifold near the rear. That boot can get oil on it and swell, creating a loose fit.
My RHD TJ
equipped... And loving it! - Durty Rok Carolina Offroad
I drive on the right
side, what's wrong with you?
Be very careful with the wife mod. Uninstallation can be extremely expensive. Wife mods have been known to take the Jeep and all other mods during the uninstall process. Also, make sure you service your wife mod properly as often as humanly possible. Wife mods not properly serviced may malfunction or uninstall themselves at any time.