6 Its a V6
4 spark plugs
the spark plugs require a 5/8 inch spark plug socket.
4 Spark plugs
The spark plug tubes need replaced.
Every 60,000-100,000 miles.
You will need 12 bocsh spark plugs. These engines have 2 spark plugs per cylinder.
The spark plugs are 100,000 mile plugs. You need o replace them with platinum plugs, then remove the throttle body and idle speed motor then clean them and reassemble it. There are no spark plug wires on the 3.5L engine.
From the top you will need to remove the wiper module and have a cold engine. You can also remove the plugs from under but you will need a lift and cold engine.
Two
On a Ford Excursion ( if it has a gasoline engine ) ( the 5.4 liter V8 engine has 8 spark plugs ) ( the 6.8 liter V10 engine has 10 spark plugs )
There are ( 6 spark plugs ) on the Ford 4.0 liter V6 engine
There are ( 6 spark plugs ) for the 3.8 liter V6 engine in a 2000 Ford Mustang