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Old 03-15-2004, 20:20   #1 (permalink)
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confused spark plugs

Hey guys!
I just bought a 97 expedition today, I'm trying to change the spark plugs but I dont Know where they are. 97' 5.4 engine HELP!
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Old 03-15-2004, 20:29   #2 (permalink)
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Re: spark plugs

follow the spark plug leads all the way to the block
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Old 03-15-2004, 20:38   #3 (permalink)
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biggrin Re: spark plugs

thanks for your help!!!!!!!!!
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Old 03-15-2004, 23:32   #4 (permalink)
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Re: spark plugs

There are no plug wires on a 5.4. No distributor either. It's all done via the computer and the crankshaft position sensor.

The plugs are below the coil packs in the top of the cylinder head. Just remove the small bolt holding each coil in place, unplug the electrical connection at each coil, pull the coil up and out, and remove the spark plug with the right socket. When removing the electrical connections, be sure to label them so you don't get them mixed up. It's tough to reconnect them wrong, but it is possible.

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Old 03-29-2004, 00:19   #5 (permalink)
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Re: spark plugs

Do the spark plugs need to be replace on 5.4's? If yes, what mileage?
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Old 03-29-2004, 00:29   #6 (permalink)
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Re: spark plugs

most of the plugs used in todays vehicles are platinum tipped and are supposed to be good for 100,000 miles but i prefer new plugs at around 60,000 to 70,000 unless they arent wearing down.
the best thing to do is pull a couple of them and see if the electrode is eroded and make your decision based on what you find.
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