[QUOTE=blinkwatt]I have no clue where I got this from
-Remove electrical connector from precatalyst oxygen sensor.
(You may want to use PB Blaster and let it do it's job for 10 minutes on the oxygen sensor-precat/postcat meet up point) ++1
I have done it a few times and Blinkwatt post basically covers everything, it's a fairly straight forward project (easy), I would remove the tires for better access