l am trying to change my own spark plugs, but l do not know where it is.This could be the difference between spending $250 and $20.
Even for a V6?

Look close to the front of your engine there should be 4-6 wires running to other places under the hood if you take off those wires ull find your spark plugs.

Great suggestion by the other responder..not. You need to get a shop manual to show where the plugs are and what you need to do to properly replace them. The manual will come in handy for anyone who is a DIY type.

For the V6 u will find the Distribution Coil at the back of the engine
near the wiper cowl.
If the wires r still stock(which l doubt) they may say Ford on them & be numbered 1-6 they run from the coil to the left & around the front(3 of them) the other 3 run just below the coil.
The rear 3 r difficult to remove & sometimes harder to reinstall
you will need a 10 inch extension to remove them, & possibly
need to loosen the distributor coil to get to one or two.

The front three r easy, they can be found under the ''Duratec'' engine cover.

The Duratec uses a waste spark distribution system, so it does require DOUBLE PLATINUM plugs. Do not waste ur money on anything more, but definitely do not go cheap(as u will end up replacing cheap plugs sooner)

When & if u do the plugs, do them one at a time so as not to mess up the order of the plug wires.