one for each cylinder i.e. 4 for 4 cyl, 6 for 6 cyl
Nothing personal, but if you have to ask that question, you shouldn't be any where NEAR a motor.
4
Most had a V-6 under the hod, which would mean 6 spark plugs.
6
Count the spark plug wires
8 spark plugs
4 Spark plugs
If you are certain the wires are connected to the proper spot on the coil pack then it is likely the coil pack is bad. This is a sonewhat common problem not only on these engines but on very many across many manufacturers.
( 6 spark plugs ) for your V6 engine in a 2003 Lincoln LS
Count how many spark plug wires there are.....
6! hints... V6
Probably 4