Here are the steps on how to remove the spark plugs on a 1998 4G92 Mitsubishi Lancer engine:
1. Disconnect the negative terminal of the battery.
2. Remove the valve cover.
3. Remove the spark plug wires from the spark plugs.
4. Use a spark plug wrench to loosen the spark plugs.
5. Remove the spark plugs.
Be sure to replace the spark plugs with the same type of spark plugs that were originally installed in the engine. Also, be sure to gap the spark plugs correctly before installing them. The gap specification for a 1998 4G92 Mitsubishi Lancer engine is 0.028 to 0.031 inches.