Your fuel economy must have been poop with the fpr disconnected...you had a vacuum leak and your were running at max fuel pressure

 

Y'know... I was wondering why I was getting around 7 mpg... Guess that explains it.

 

Update:

Replaced the #1 knock sensor tonight. DAMN I did that in record time. The other night it took me almost 4 hours... Today it only took me about an hour and 15 minutes!

Anyway... Got everything plugged back in, plugged the battery back in, and started revving it through the RPMs to try and get the computer to re-learn idle. Not 5 minutes after that, a cop shows up in my driveway.

Ended up being a really cool cop and we started talking about cars. Turns out he was the original owner of a 1967 GTO but had to sell it a few years back.

Took the truck for a quick test drive to make sure everything's running right. Drove 45 miles and no codes. WOOT!

 

Right on