How do you set the timing on a 1993 Ford Mustang XL?

Answer 1

Most newer cars 1990 up the timing is controlled by the computer. Read the tag under the hood that tells what motor is the the car it will probably say do not attempt to adjust timing.
That is partially correct. The computer controls timing once the initial timing has been set. You can set the initial timing. You need a timing light. Basically you set up the timing light per its instructions and loosen the distributor hold down bolt/nut. Remove spout, start car and check timing with your light. You can move the distributor slightly to adjust the timing and tighten down when you are where you want to be. I would not go above 14 degrees and if you go there use premium fuel. HTH