I've been running a fidanza in a 7 bolt for about 6 months/7k miles with a act 2600 ppm and street disk. No issues. Removed transmission recently due to breaking some gears, inspected the clutch and flywheel and everything seemed fine. I just put locktite on flywheel bolts nothing else was done.

I would replace the coolant first. And erase codes.

If the coolant is bad (which you have a code for) it will give wrong readings to the ecu which will mess with your afr. So yes the ecu might think it's running cold

Replace your coolant sensor . That could cause you to run rich

For a 1g or 2 g?

anybody going to the track tonight?

Hey how's it going? What part of el paso do you reside in?

Same happened to me, I have to use Teflon on the filter or it will leak.

Your not doing 3rd gear pulls are you?

I think you just need to pull the transfer case here are the instructions I found