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Q: how do you change the spark plugs on 2002 Ford Excursion

I'm old school and when I looked for the sparks plugs I chould only find what appeared to be some kind electronic device close to the fuel rail. so the question is where and how do you change out the sprak plugs
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There are quite a few threads on this repair question area of Repair Pal to refer to. Perhaps review a few of them as well as this. Try F150's in your search...

My first recommendation is -- probably do not try to service these plugs. There is a lot at risk here.

The plugs are straight down into the engine, to the left and right of the intake. They are concealed by coils. Each plug has a coil. Each coil has an electrical connector on it, and is screwed down by a hex nut. You would remove the hex nut, pull straight up on the coil, and then access the plug.

Problem is -- the coil boots usually need replaced once you tamper with them. You will need 10 boots. The plugs are very tricky to remove. Sometimes they can break causing you a world of trouble. Sometimes they can pull out the threads from the cylinder head, causing major issues as well. When reinstalling plugs, they need to be torqued properly.

Some people use anti-seize fluid to loosen the plugs. In any case, the engine does need to cool before trying to get the plugs out.

With this information on the table, and a host of experts online here who feel the same, I would recommend you take the truck to a trusted facility -- even a dealership, as this is one time for sure experience and knowledge prevails. I can understand the "old school" and "do it yourself" approach...still...the best choice in this case is to defer to the experts. Good luck.
The dealership wants $600.00 and this only includes the plugs changed. I quote "if the plugs don't break, around $600.00"
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