Hello Folk,
I would like to replace ignition coil in my navigator by myself. Is any quide or manual for this?
Thank you in advance.

 

ofcourse there is a manual it is available at any auto parts store, but you dont need one of you are even slightly mechanical. you will need to remove the fuel rail on the side you are working on, but depending on what side you are working on, you may need to remove a few items that obstruct your work area. good luck i have changed all of mine on my 02 expedition 5.4l it was pretty easy. good luck

 

Do NOT need to remove the fuel rail. For coils all you need is a 7mm socket. I used a flexible bit driver (kinda looks like a spring with a screwdriver handle on it)

 

Does the '03 Navigator have the DOHC engine or is it the same engine as the Expedition?

 

All 2003-2004 Navigators have the DOHC 5.4L.. IIRC the coils are under the access panel on each side valve cover.. I have not changed my coils/plugs yet, but they look to be a harder job than on the 5.4L SOHC motor..

Dave

 

how do you remove the #8 COP? the fuel inlet connections are in the way.

anyways i had NO! issues at all when doing it my way and also for a first timer it would be smart to make sure he dosent get the COP boot on there half cocked. removing the fuel rail is the best way to make sure he avoids inproper installation of the COP

 

I believe the 5.4 Expy is a different animal from the 5.4 Navi engine. I believe the Navi's fuel injectors are under the intake manifold, whiile the COPs are under an access panel in the valve cover.

 

It's actually easier.
JL

 

His Navigator has a 32V DOHC 5.4L-NOT the 16V SOHC version used in the Expedition. The fuel rails DO NOT need to be removed.
JL

 

I know I am digging up an old thread but this is the info I am needing for my wifes 03 Nav. I posted some pics of my trouble codes, and I am think my cylinder 2 is bad.
Here is a link to my thread with AE codes listed.
https://www.ford-trucks.com/forums/1...lp-please.html
guess I am off to look for an access cover

 

Well here is the damage
https://www.ford-trucks.com/forums/a...1&d=1383618184

COP's are definetly under the access panels on the valve covers. Looks like a spark plug made its way out of the hole and beat the **** out of the COP and I would imagine ruined some threads on the head since I can not get a plug to start. Any suggestions short of pulling a head???

 

Yep.
++ Ford Spark plug Repair ++

 

Thanks man. I just found that thing before I jumped back over here. Guess a $400 kit is better than a new head and the headache of pulling it out and putting it back.

 

In the other thread I suggested looking on eBay for a used kit. As long as it still has one repair coil you might get the repair done cheap.

 

Well I read a lot on here as I am not a mechanic but am mechanically inclined as I've been doing construction work for 15 years now. Anyway my 03 Navigator 5.4L with 134,000 miles on it was hesitating on acceleration, shaking on idle, running like crap basically. Took it to advanced had codes read and said misfire on #2 and running lean in bank 2. So looked up on here and you tube and figured out that it's probably ignition coil (COP). Changed it out this morning wasnt too bad just had to remove computer and bracket and push some hoses out the way to get cover off disconnected wire and pulled old one out and put the new one in and hooked everything back up and together and so far it's running good. Took me about 30 minutes and I've never done it before. I didn't do all eight even though I bought all eight and plugs. I felt like the term if it ain't broke don't fix it was good to follow as I heard stories about stripping out and breaking plugs in the aluminum block engines, and I definitely don't have the money to replace or fix that. Someone told me that the misfire can jump from one coil to the next after replacing just one. I don't see how but like I said I'm not a mechanic. If anyone has any suggestions on what I did versus what I should of did or about if I should go ahead and change all the plugs and coils please let me know. Ive heard of Thank you all for all your help and information.