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You'll need to warm the truck up so you can still touch the engine by hand. Then pull off the coils which come off by disconeecting the electrical wire and then removing the single screw that holds them down. Once all the coils are removed you'll want to blow out the eight spark plug chambers. A lot of dirt and debris will fill around the the spark plug. Soak each plug with penetrating oil...Ford recommends AeroKroil which is very good stuff. I used PB blaster which is good but not as good as AeroKroil. I'd soak for about10 minutes then loosen slowly 1/8-1/4 turn. Let soak for 10 minutes longer. Then slowly turn the spark plugs out. Don't be surprised if they break in half. Ford did not use ant-seize so they tend to seize to engine. People with less than 60K miles don't have too much problems compared to people over 60K. I changed mine at 88K. Original owner never changed them so I knew I had a problem. If they break don't be worried there is a tool that works well in removing the broken end. It's made by Lisle. I picked my tool up at amazon for $60 with free shipping local tool shop wanted $100. For replacement plugs champion makes a single body double platinum that is very good. Autolite also makes an HT1 & HT15 as replacement. You'll need Nickel anti-seize for coating of new plugs. Also some electrical silicon spray for the coils when you re-install them.

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Q: How do you remove spark plugs 5.4l 2005 Ford F-150?
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