Looking to change the spark plugs on my 2002 expedition. it has a 5.4 in it. I know that the coil packs are on top of the spark plugs and under the fuel rails. just need to know how to get the coil packs off and hows easy the plugs will be to get out. Is there anything else I need to do to get them out. thanks for the help.

 

i have not done mine yet so i cant tell you but if you do a serch for spark plug change there are several post that give you detailed instructions on how to change them i will be changing mine in about 5000 miles my frind just change a set in our shop truck which is a f150 with a 4.6 and it took him about 3 hours to change them he did not take the rails off just took the bolts out then removed the coil packs there held on by two bolts pulled the plugs out stuck a new plug on a piece of fuel line and used that to set them in and start them that trick seemed to work well. good luck with plug change

 

https://www.ford-trucks.com/article/...ter_F150s.html

 

I like to sent my thanks to all one more time for the help. I will find out by next weekend how long and hard it will be to do this.

 

Just be careful when extracting the plugs!! Do them 1 at a time and only have 1 plug out at a time, I dropped a screw from the next COP down the hole I had just removed a plug from as I was gonna do the whole side at 1 time. BIG MISTAKE!!, It ended up dropping inside the cylinder on top of the piston.. 3 hours later with a small chunk of kitchen magnet taped to a coat hanger I got it out. Talk about stressing out!!!!!
And heed the advice of blowing out the area after removing the COP but before removing the plug itself, talk about sand, rust and god know's what else!! Not good for the rings and walls if that gets in there!!

slick..

 

Also be careful replacing the fuel rail. Don't force it. I did and ripped an o-ring. Got it all installed the had fuel leaking. Had to pull it all apart and replace the o-ring.

 

It sucks changing the plugs on the 5.4, but as long as you have plenty of universal joints, and extensions, and patience you can get it done in an evening.

 

I didn't have to remove any of the fuel rails, I just turned the injector electrical hookup point out of the way after I unplugged it, worked for all 8 plugs for me, yes universals were a god send for sure, what worked best for me was a 1/4" set with extensions/universals and a 1/4 x 3/8 enlarger so I could use the 5/8" spark plug socket with the 1/4" drive also used a phillips head screw driver from the drive set with the universals for the COP removal as well!!

 

i thought you just waited till they popped out....????

 

How did it go Blackheader?
If you havn't done it already and plan to keep the truck, consider the following:
1. Replace all boots at $4 each - available at Napa
2. Install a new COP for #4 or #8, whichever will make you curse more, and keep the old one as your spare (if you feel like keeping two spares, replace 'em both )
fyi, there is a $10 rebate at Advance for Autolite dbl platinum if ever you're considering it, will buy you 3 gallons of gas...

Good luck

 

I agree on replacing the boots, but I found these:
http://www.wittydeals.com/product_in...products_id=83
they are the boots and springs, they call it a tune up kit. They were also around 4.00 each. I went ahead and replaced one COP (#4) because it has a rep for going bad.

I removed the fuel rail on the passenger side (probably did not need to).
Did not remove the rail on passenger side, but needed an open end 7"" wrench to get the cop screw out.

Other than that my only recomendation is do not do it in the pouring rain under a tarp like I did (took the day off, too hard to reschedule). Kept it cool though.

Don

 

yea, i agree.

if you pull it off all at once you may end putting on the wrong spark plugs. and something bad happens, results would be either wrong firing order or it may run bad. and even worse, it may not run at all.

i hope you could do the job well. good luck.

 

Ok I replaced the plugs and it was not bad at all. It took about 1 1/2 to 2 hours to do all. Thanks to everybody for their help.

 

it's good to hear you've got the job done.

 

how often are you supposed to change the spark plugs i have a 2003 Navigator with 45000 Miles