Question about Ford Expedition
Each plug has it's own ignition coil. Remove the bolt from the coil and pull with a twisting motion. Be sure not to lose the spring inside the boot. If I remember right these plugs are 9/16. If you have an air comressor, be sure to blow any debris out of the hole before removing the plug.Don't forget the anti-sieze and dielectric grease when reinstalling. Hope this helps.
Posted on Mar 17, 2011
Remove the COP Ignition Coil,1 screw, should
be 10 mm,then the Spark Plug
If it is a 3 valve engine,you will need a
Champion CHA 7989 ONE PIECE Plug
The Ford plug is a two piece and glued together,
They are $16.00 at NAPA --each !!??
Posted on Mar 17, 2011
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Posted on Jan 02, 2017
SOURCE: changing spark plugs
Changing the spark plugs on a 1997 Ford Expedition 5.4L engine takes patience. Remember to start this project on a cold engine! I started on the passenger side by locating the Coil over iginition coils and cleaned out all the old dirt using some compressed air. Then I had to disconnect the electrical connections to both the Coil over ignition coils and the passenger side fuel injectors. Once you remove the small bolt which holds the ignition coil in place, use your compressed air again to blow out the spark plug hole. After that, you will need a 5/8" swivel spark plug socket and various length extensions to remove the spark plugs. Take your time because there is not much room for your hands. Before installing the new plug, check the gap and use clean engine oil on the new threads. Tighten the new spark plug and reinstall the coil over ignition coil. Reconnect the electrical connection to both the ignition coil and the fuel injector. Continue these steps with all eight spark plugs. You will find the ones on the drivers side are difficult because of the fuel rail gets in your way. Have patience and use swivel extensions to work around the tight spaces. When you are done, you will have saved lots of money! Don't forget to replace your air filter, fuel filter, and pcv valve to complete your tune up.
Posted on Jun 23, 2008
That's because they are hidden quite well. If you look at the engine, you'll see yellow plastic prongs (?) that look like spark plugs, but hook up to the silver tubing. That's the fuel injectors. BUT, right behind the yellow plugs, are black ones. The black one is the connector to the spark plug. The plug itself sits about 4 inches down into the block of the engine. They are a real pain, and from what I can tell, you only have decent access to the first 2-4 of them, then they get too far back and start going under the dash (you'll see what I mean when you get there).
Posted on Aug 06, 2008
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