The engine would either not start or run roughly.
Car would not run AT ALL
to much oil or spark plug is bad
If you know that there is spark at the distributor cap then I would think it would be bad spark plug leads.
A drain plug for a spark plug? Now why would there be? What would you drain from a spark plug.... the spark? If you're referring to a plug for the spark plug socket, I'm sure you could find something that would fit that would keep out debris while you let you engine sit without plugs. (Why??)
bad spark plug wire.
If you have no gap meaning the electrodes are touching then the spark plug is being grounded therefore causing a no spark situation. There has to be a gap in order for the electricity to jump from the electrode to the ground.
it could be a bad spark plug wire or the plug could be gapped to much
The spark plug gap for a 2003 Buick LeSabre should be set at .060 inches. The best spark plug for this vehicle would be an Iridium plug.
Bad spark plug, bad spark plug wire
Just a wild guess, but I would start at the top of the heads.......should see a spark plug wire connected to a plug........viola! spark plug.
You would likely need to pry it up as you turn it. The problem will be getting a new spark plug in, since you likely damaged the head. Once the spark plug is removed, you would likely have to sleeve the hole to get a new plug to stay.
If you mean that the wire came out of the boot, then pull the boot off of the spark plug and use a spark plug socket to remove the spark plug.