I'm having a hard time removing the wiring hardness between the ecu and the engine bay. Do I need to remove the section under the glove compartment? Sorry, haven't had chance to take pics... thanks for the help.

 

If you squeeze the big Grommet at the firewall and force it outwards,then it will give you Light on the inside under the dash to see more clearly.
You will need to disconnect a couple things on the passenger side kick panel,so you will need the kick panel removed to do that.
You'll also need to access the ECU under the carpet,so take the plastic rocker off.This allows you to move the carpet more freely.
It's not exactly a Easy job..like a 6-7 to get the harness out.BUT taking the harness out this way and keeping the harness intact ON the engine is a No Brainer.It makes for removal and install very easy.

 

Thank you for the suggestion. Worked as suggested.