Just a timing light isn't going to fix anything. A timing light is only going to convey information that you won't otherwise know with out the light.

Anyway, there's a very small amount of timing adjustment available on that car. If everything else is doing what it should be, then your car should run regardless where the mechanical timing adjustment is set. Most of the ignition timing is being handles by the computer.

I would check other things before trying to time the engine. And, if you're running rich, changing your ignition timing isn't going to change that.