Look on the sticker under the hood. The emissions sticker.
On a 2004 Ford Freestar : ( No ) Both the 3.9 and the 4.2 liter V6 engines have the ( Electronic Distributorless Ignition System , EDIS ) They use ( 1 coil pack with 6 towers for the spark plug wires )
Check the Vehicle Emissions Control Information ( VECI ) decal located in the front of your engine compartment ( it will show the type of spark plugs to use and the spark plug gap )
On the 2004 Freestar both the 3.9 and 4.2 litre engine the gap is 1.3-1.4 MM, .052-.056". This comes right from the owners manual
firewall 1-----2-----3 4-----5-----6 front of Ford Freestar > driver
There is not a drain plug on the Freestar - a good old fashioned siphon hose will do the trick.
The spark plug gap, for your 2004 Ford Taurus 3.0 liter engine, is .009. Most spark plugs will come pre-gapped.
from the bottom ,behind the sub frame.for the three rear plugs.
Check the Vehicle Emission Control Information ( VECI ) decal located in the front of the engine compartment ( it will show what type of spark plugs to use and the spark plug gap )
.054
Check under the hood decal info.
.054
Spark Plugs, Spark Plug wires, PCV Valve