How do you set the timing on a 1996 Kia Sephia 1.8?

You need to loosen the two 10mm bolts that hold the distributor in place. Connect your timing light to the #1 spark plug wire. Timing specification at idle is 10 degrees with the DLC connector jumped. You need a short piece of wire to connect the "DIAG" and "GND" terminals under the box that says "Diagnosis" under the hood. Rotate the distributor as needed to set the timing to 10 degrees.