Where are spark plugs on 1998 lincoln town car?

The spark plugs on a 1998 Lincoln Town Car (assuming the 4.6L V8 engine) are located on the top of the engine, between the valve covers. You'll need to remove the plastic engine cover to access them. They're generally arranged in a V-shape, following the layout of the cylinders.

To be precise, you'll need to look between the two valve covers, and you will see the spark plug wires or coils leading down to them. However, always consult a repair manual specific to your 1998 Lincoln Town Car for detailed diagrams and instructions. This will show the exact location of each plug and the proper firing order. Improperly installing spark plugs can damage your engine.