This DIY was created by eclark53520. I am simply posting this in the DIY section so it is easy to find. Thank you eclark.
Extension (I recommend a 6 inch)
5/8" Spark Plug Socket
Recommended plugs for the 2.7L are Champion RC10YC4 and NGK PFR5N-11
Remove plastic engine cover (Hint: Pop off the silver inserts and H sign to get to the bolts holding it on)
Remove intake hose between MAF sensor and throttle body (Use steps 11-17 in this DIY for help if you are unsure on how to do this: http://newtiburon.com/forums/showthread.php?t=150273
Remove throttle body (DIY posted here: http://newtiburon.com/forums/showthread.php?t=1761
Remove upper intake manifold (DIY posted here: http://newtiburon.com/forums/showthread.php?t=1760
Measure and gap all your new plugs. I use a .044 gap I believe. Recommended gap is 0.039~0.043 in. or 1.0~1.1 mm
Pull black boot off of spark plug and out of the plug well (recommend you do one plug/wire at a time so you don't cross the firing order)
Use 5/8" plug socket, extension, and ratchet to remove the spark plug
Apply anti-seize (copper preferred since the plugs get hot) to the threads on the new spark plugs to prevent damage to the aluminum heads.
Guide the new spark plug into the plug socket. Using the extension, lower the new plug into position, being careful not to damage the ceramic insulator. Use your hands NOT the ratchet to get the plug started in its threads. You do this because you don't want to cross thread it. If it doesn't go in relatively easy for the first few turns remove and try again.
Use the ratchet to tighten the plug firmly. Do not over-tighten, as this can cause cause you to damage the threads in the cylinder head. Torque wrench specs are 18-21 ft/lbs. If you don't have a torque wrench, just grab the head of the ratchet with one hand and tighten as much as you can. For most people this will get you about 17ftlbs.
Apply dielectric grease to the inside plug wires (on each end) to prevent any possible damage.
Replace spark plug boot onto spark plug. Make sure it snaps into place and can't fall or pop off.
Note: It's recommended you replace your throttle body and intake manifold gaskets, but unless you notice any cracks, chips, damage, etc., you will be fine to reuse the ones you have.
Here is my contribution:
It is not necessary to completely remove the throttle body from the engine. Simply unbolt the two bolts and the two nuts that connect it to the manifold. The throttle body will just hang there after the manifold itself is removed.
-if you don't have a spark plug socket, you can use a plastic or rubber hose about 8" long and 3/8" ID to push onto the top of the plug to remove or install, otherwise the plug will likely fall out of a regular deep socket.
-if you do fully remove the throttle body from the UIM, make SURE the bottom TB bracket is OUTSIDE the TB, NOT between the TB and UIM.