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On a 1998 Navigator, with a 5.4 liter V-8, each plug access is located on the top of the engine. There will be a round cap held in place with a small bolt right below or next to the chrome fuel rail. This is the Coil for the spark plug. All the spark plugs have their own coil,there are 8 of them, unlike older vehicles with only one coil and a distributor. Anyway, the computer tells the coil when to fire and so it goes with all that NASA computer mumbo jumbo. The coil must be unbolted from the engine by removing the small bolt / screw. Be carefull not to damage the wires running to the coil pack, they cost about 100 bucks a pop. Pull straight up on the coil and extension tube and withdraw it from the engine. At the botom of the hole is the spark plug. You will need an extension on the socket wrench to remove the plug. After that is the same procedure for the other 7. Gap should be at .054 and make sure to install the new plug with your fingers and the spark plug socket. This will allow you to be absolutely positive you are not cross threading the plug. Do not force or overtighten the plugs. Once you see how far down they are if the threads in the engine block get screwed up it will be VERY expensive to correct.
NOTE: The driver side rear plug will require you to loosen and lift the fuel rail about 3 inches. I considered writing Ford when I had to do this. Arrgghh! Also, if you are replacing plugs, make sure you either get the recall part, or fabricate one yourself... it's a small metal shield or 'umbrella' for the top of the passenger side rear plug/coil. The heater hose connection is right above it and an occasional drip will cause failure quickly once the inevidable leak develops. (Been there, done that)
What else can I help you with?
How do you find and install spark plugs on a 2004 Lincoln Navigator?
Locate and install spark plugs for 2004 navigator
How many spark plugs on a 2003 Lincoln navigator?
8 spark plugs
Can you have a diagram of your spark plugs in a 2001 lincoln navigator?
The 2001 Lincoln Navigator spark plug diagram can be obtained from most Lincoln dealerships. The spark plug diagram can also be obtained from most auto-parts stores.
Where are the spark plugs for 2002 Lincoln Navigator located?
Where are the spark plug for 02 lincoln navigator located #1#2#3 ====================================================== On a Lincoln Navigator : firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of vehicle
How do they charge to change spark plugs on a Lincoln navigator?
The spark plugs are located beneath the individual ingnition coils. Remove each coil then remove spark plug as normal
What causes misfiring in the 2003 Lincoln Navigator?
The Ignition Coil is the one that cause misfire or Spark Plugs
Looking for the spark plugs on a 99 Lincoln Navigator?
they are under a panel by the fuel rails. they are very hard to get to.
Remove spark plugs on a 2003 Lincoln Navigator?
The coils are bolted to the side of the engine, The spark plugs are under the coils, NO PLUG WIRES. unbolt the coils and use A spark plug socket.
How do you find and install spark plugs on a 1999 Lincoln Navigator?
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 ....
What type of spark plugs do the 2003 Lincoln Navigator use?
Check the Vehicle Emission Control Information ( VECI ) decal located in the front of the engine compartment ( it will show the type of spark plugs to use and the spark plug gap )
How do you reach the last 4 spark plugs on a 1998 Lincoln Navigator?
I am having the same problem, and would also like to find out.
Where are the spark plugs located on a 2001 Lincoln navigator?
In the left rear tire, only visible while vehicle is moving in reverse
