Disconnect battery negative cable. Each plug has it's own coil. Remove each coil by the one screw attached, disconnect electrical plug and pull out the coil boot. There are two pieces to each coil.
Your truck does not have ignition coil. Instead, it has coil packs. The 5.4L has eight coil packs one on each spark plug. The 4.6L has two coil pack blocks 4 on each block.
8 -one per cylinder
Good question.
There is a plate on each side of the valve covers usely two screws under the plates are the coil packs and inside are the sparkplug hope that helps ....
underneath the plastic cover on the engine head are the spark plug wires, there are 2 coil packs there. the wires connect the coil packs. 2 of the spark plugs are under the coil packs and the other 2 are exposed...
Go to AutoZone have them rear your codes for FREE. This way you will know which Coil Pack is goig bad / or is bad. If you have a 4.6L you will have only 2 Big Coil Packs. If you have the 5.4L you will have 8 Coil Packs , One coil pack for each cylinder.
I don't know if the 2003 have 2 coil packs. But I do know my old 1998 ford expedition XLT (4.6L) Had two coil packs in front on the engine. One on each side of the block.
If it has coil packs, you can't.
check the coil packs I had to replace all 6 in mine it is not hard to do you can get the coil packs at bavauto.com a new set will cost you $449.95 these are the high performance coil packs and if you dont know how to put them on you can see how to install them at www.wonderhowto.com you need to change the spark plugs too the best ones are the bosch platinum plus. good luck this took care of mine. flame-out1956@att.net
On a 1998 Ford Expedition : The 4.6 liter V8 has the Electronic Distributorless Ignition System ( EDIS ) and it has ( 2 coil packs ) along with the ( 8 spark plug wires ) ------------------------------------------------------------------------------------------------ The 5.4 liter V8 has the Coil On Plug ignition system and has ( 8 ) individual coils
You can buy the hole kit from ebay. For 199.00 (coils plugs air filter gas filler ) All delco
four coil packs