here's a good example from sport trac web site http://www.mysporttrac.com/mysporttrac/ ...look up spark plug in projects
The spark plugs on a Ford Explorer are replaced by first disconnecting the battery. Remove the spark plug using a spark plug socket. Replace with the factory recommended spark plug.
How to replace spark plugs on a 2010 ford fusion
Spark Plug size is standard and there is a socket you can get at the Hardware store. You will need a 3" extention and a 3/8" drive rachet.
.054 inch
Pull them out and replace them one at a time.
Use a spark plug socket with extensions.
Use a spark plug wrench?
you have to replace all of your spark plug wires. there is a coil built into the top of each boot that goes over each spark plug. that's why the wires are so costly.
For the US model Ford Focus (2006), spark plugs are the only thing to replace. There are no spark plug wires. Ford recommends spark plug replacement at 100k miles.
To replace spark plugs and the air filter in a 2003 Ford Fiesta, it is important to do the spark plugs one at a time. Replace the spark plug wire each time before loosening the next plug. The air filter is enclosed in a plastic case near the left front of the engine.
It unscrews just like a spark plug.
Check the Vehicle Emissions 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 )