Chances are you have a big plastic cover over your entire engine. Look for the holes on that cover and remove it then follow the wires from your distributor or coil pack if provided based on your model and engine size.
at the end of the plugwires.
A 1998 Lincoln Town Car has the Coil On Plug ( C.O.P. ) ignition system with ( 8 ) individual coils , so it doesn't have the " normal " spark plug cables
it is an V8 meaning it has 8 plugs
Check the Vehicle Emission Control Information ( VECI ) decal located in the front of the engine compartment ( it will show the type of spark plugs to use and the spark plug gap )
Open the hood and chase out the spark plug wires.
A 1999 Lincoln Town Car has a 4.6L V8. Ever since (I believe) 1991 they have had this engine.
Gap 0.50 (in thousandths)
.054 inch ( spark plug gap for the 4.6 liter - SOHC - V8 engine in a 2002 Lincoln Town Car , according to motorcraft.com , one of Fords websites )
According to one of Ford's websites : For the 5.0 liter / 302 cubic inch V8 engine in a 1986 Lincoln Town Car : ( the spark plugs are gapped at .050 inch )
According to one of the Ford websites : For a 1990 Lincoln Town Car 5.0 liter / 302 cubic inch V8 engine : ( the spark plugs are gapped at .050 inch )
On a 1998 Lincoln Town Car : firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of vehicle
On a 1998 Lincoln Town Car : It has the Coil On Plug ( C.O.P. ) ignition system with ( 8 ) individual coils ( 1 ) coil for each spark plug