The exat location of the spark plugs depends on whether you have a 3.0 DOHC 24 valve engine or a 3.0 OHV 12 valve engine. Follow the spark plug wires, which are the large grey colored electrical wires you see near the top of the engine. They will lead you right to the spark plugs.
In a 1995 Ford Taurus : ( there are 6 spark plugs ) for the 3.0 or 3.8 V6 engines
6
The spark plug gap, for your 2004 Ford Taurus 3.0 liter engine, is .009. Most spark plugs will come pre-gapped.
Spark Plugs, Spark Plug wires, PCV Valve
With a socket set :)
The spark plug gap for a 2005 Ford Taurus 3.0 is recommended to be set at 0.44. The actual setting varies based on the specific spark plugs used.
5/8 deep insulated spark plug socket
in the front and back of the engine directly above the exaust manifold
Ford uses ( Motorcraft spark plugs ) Check the Vehicle Emissions Control Information ( VECI ) decal located in the front of your engine compartment ( it will show what type of spark plugs to use and the spark plug gap )
According to one of Fords websites : For a 1986 Ford Taurus : ( both the 2.5 liter four cylinder engine and the 3.0 liter six cylinder engine have the spark plugs gapped at .044 inch )
one at a time
A Ford Taurus and Contour are a couple. (1997 Taurus with the 3.0 liter engine & 2000 Contour with the 2.8 liter engine)