Decided to read plugs after a few hundred miles with new tune and O2 manipulator. What a pain in the ass. You will need a 12 pack and set aside a weekend day to complete.
You need to remove fuel tank, coils, evap can, anti lock brake module will have to be moved out of way. Also remove intake runners to gain access to fuel rail disconnect to avoid damage, it is behind master switch so you can't easily disconnect. You can reinstall intake runners, while tank is off because reconnecting fuel line is a snap.
Tools required, 14 mm spark plug socket,
10 mm socket, 3, 5 mm hex sockets, sharp hose pic to aid in rubber intake manifold reinstall.
My rear tank fixing was already corroded so I will replace it.