The plugs are located under the coil packs. So you remove the electrical connector, remove the bolt, remove the coil pak and then remove the spark plug.
You can't really test the coil packs without a diagostic machine and a schematic of the tests you have to perform. So you'd have to gear up for that test.
If you're having a misfire issue, you may want to get ahold of a workshop manual, either through Amazon or your local public library, or a subscription to www.alldatadiy.com to learn more about the testing procedures.
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