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Hi, I just replaced the spark plugs on my 2004 Ford Expedition with the 5.4 L engine. I'm quite a beginner and this is the first time I've done it, but the engine runs fine so I think I did it OK. I had a hard time finding the spark plugs because they are hidden in the engine block under a rubber boot, under the ignition coils. Each spark plug has its own little "coil on plug" ignition coil. But the ignition coils were easy to remove. You squeeze the electrical connector and disconnect the wires going to the individual ignition coil. Then you remove the one bolt that holds the ignition coil in place. Then you gently pull the coil up (you may have to pull it at an angle because the fuel rail is in the way) to disconnect it from the spark plug, and it will come out with the rubber boot attached. The rubber boot keeps debris from falliing into the well where the spark plug is located.
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∙ 14y ago
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Show you how to replace ignition coils for a ford Expedition 2003?
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