Do your plug wires too. Maybe a valve adjustment.

One thing of advice I can give: The rotor is held on by a retaining screw. Take of the cap to see it. It may not be visible depending on where the rotor is turned. If it isn't visible, crank your car a couple of times with the cap off until you can see the screw. It will probably just take a couple to times. The screw is made of really soft metal and it is held in by loctite, so don't strip it. Make sure your screw driver (philips) head is the right size. My first time, I stripped the screw and couldn't remove the rotor. I basically had to break the rotor to get it off.