98 sportage tach quit working anyone have any ideas?

If the tachometer in your 1998 Kia Sportage has stopped working, it could be due to a faulty connection, a blown fuse, or a malfunctioning instrument cluster. First, check the fuses related to the dashboard instruments. If the fuses are fine, inspect the wiring and connections to the tachometer. If everything looks good, the issue may lie within the instrument cluster itself, and you might need to have it repaired or replaced.