Here's what I got done today:
Wired in the Innovate XM-16 wideband 02 sensor, and found out my original 02 sensor wasn't plugged into jack. Also found out that whatever it IS supposed to plug into is missing. The downstream 02 is hooked up though. I'm guessing it's stuck somewhere up above the transmission from the 2wd-4wd conversion I did a while back.
That explains my 10MPG regardless of city/highway driving. I could always smell fuel outside the tailpipe. I thought because it was stroked with 4.6 liters of raw power it just needed to be tuned. Turns out the beast has been using the open-loop/multiple choice answering method to tune the fuel curve. And I thought 33x12.50's with a 6.5 inch lift was my problem.
Tsk Tsk.
But anyways, when I convert to 4.5" with 31x10.50 and I have my wideband 02 hooked up and my SAFC-II altering the fuel curve I'll probably be back to, or maybe even better than, 20 MPGs with my 4.6 torque tyrant.
I also wired in the MSD 6AL and MSD High Vibration ignition today as well.
And used 3 rolls of electrical tape to tape all of it OCD style. After I get everything going good I'm going to buy 10 more rolls of E-tape and OCD the rest of everything else with a wire... just cause. Does anyone else ever have the urge to do this?