How do you change the spark plugs in 1997 mark viii?

Take the intake tube off the intake plenum/mass air flow sensor box and put it out of the way. Then remove the two bolts that hold the plate on top of the valve cover off which will expose the coil packs. Unplug the coil packs very carefully and then gently pull straight up on each coil and the plugs will be exposed. ou will need a 10" extension to reach all the way down in the tube to get the plugs out. BE VERY CAREFUL HERE AND ONLY DO THIS WHEN THE ENGINE IS COLD, DO NOT DO IT WHEN THE ENGINE IS EVEN SLIGHTLY WARM, COLD, COLD, COLD! You SHOULD replace the spark plug boots when you replace the spark plugs. The boots are the rubber parts that are attached to the coil packs that cover the the top of the spark plugs. This should be done as the extreme conditions these rubber part endure cause them to weaken and when they are pulled out they sometimes get a small pinhole in them and then the spark is sent out the pinhole to the spark plug tube and you will have a rough idle, low performance and likely a check engine light. When reinstalling the coil packs press them down firmly and sort of "wiggle" them down till they are seated firmly on the plug. Use an ANTI-SEIZE on the spark plugs so that they will not get stuck in the heads which will cause expensive damage to the headss the next time you want to replace the plugs. Carefully clean the top of the valve covers where the plates that go over the coil packs come into contact with the valve covers and make sure that the gaskets on the plates are clean and still pliable....The rear of each plate has a half round opening to allow the wire harness for the coil packs to come through. Pay close attention to this area upon reinstallation so that they seal properly around the wire harnesses.