Black soot is a sign of too much fuel (rich mixture).This can be caused by a number of problems,examples fuel pressure regulator,02 sensors,coolanttemperature sensor,intake air temperature sensor ect.If your engine is running too rich you should be able to smell fuel in the engine oil,that can damage engine bearings.You would also have some black smoke out the exhaust pipe.If the black stuff on your plugs is oily,this from either worn valve guides or (seals)or worn piston oil control rings.Excessive burning of oil will be blue smoke out the exhaust.
In a 1995 Ford Taurus : ( there are 6 spark plugs ) for the 3.0 or 3.8 V6 engines
6
if the spark plugs are black because your car is running too rich. your plugs are fouled.
Spark Plugs, Spark Plug wires, PCV Valve
The spark plug gap, for your 2004 Ford Taurus 3.0 liter engine, is .009. Most spark plugs will come pre-gapped.
5/8 deep insulated spark plug socket
With a socket set :)
Check the Vehicle Emissions 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 )
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.
No spark? Leaking injectors?
To change spark plugs on a 1994 Toyota Camry, remove the black shafts. The spark plugs are down the four holes. Use a socket set with extension to reach the spark plugs. Replace old spark plugs with new ones.
in the front and back of the engine directly above the exaust manifold