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To tune it up you can work under the windshield wiper tub, you do not have to remove it, you will need a good spark plug socket that will retain the plug in it, and different extensions that make you feel comfortable, on the plugs that are harder to get to once the plug wire is off I place the socket into the spark plug tube and then i put the extension into the tube and into the socket, you just need enough to be out of the valve cover so you can get a ratchet on the extension, once loose lift up grasp socket remove extension and then remove plug socket with plug in it
Spark plug cable removal
Remove spark plug cable from coil first.
Always remove the spark plug cable by grasping the top of the spark plug insulator, turning the boot 1/2 turn and pulling straight up in a steady motion.
Spark plug removal
Remove hose, unscrew valve
I hope that this helps you
If you need more information just let me know
There will still be a little residule pressure in the lines be sure and wear safty glasses
PCV is in the valve cover near the intake