So awesome that you have it running! Great job. Amazing how quick that system starts to learn and smooth out.
Yes it did home in on the A/F quickly and smoothed out. I did discover that the learn function wasn't turned on for this first start up so everything that the closed loop fixed wasn't saved. Have that corrected now. The Holley software is a very powerful tool and I can see that I have a lot to learn on EFI tuning.
A couple of notes that may help others.....
LS motors will not always build oil pressure by turning over with the key. I tried all the tricks I read on the internet, Removed spark plugs so it would spin faster, back filled the oil passage that leads to the pump with oil, etc.... still no oil pressure. With the pump above the oil level in the pump the pump has to spin much fasted to draw the oil up the pickup tube. I finally decided to fire it, had 50-60 psi within a few seconds of running so all is well. Whew! Wasted half a day trying though.
Had to have my brother help me bleed my clutch master. I had purchased what I thought was a remote speed bleeder from Speedway but soon learned that it was just a "remote bleeder". Guess I should have read that more closely. Think the speed bleeder would have worked great here though and could have done it by myself. Anyway have a great pedal feel now. Was really nervous about using DOT 3 fluid and ruining my painted firewall, so I taped off everything nearby but in the end it was mess free.
I had purchased a small quantity of relays for the fans, fuel pump and any other things that might come up. Once I really dug into the EFI manual they suggested using "Flyback" style relays to prevent any voltage spikes from reaching the EFI circuits. Found some on Amazon that had the same waterproof base that I had used to do the wiring so it was an easy swap.
Wish I had mounted my ECM differently, didn't consider the large quantity of wires, relays, fuses that would all be jumbled around it. Plus I have all the connections facing downward which is a pain to plug in by feel. Especially the serial port connection. When I decided on the cavity under the fender behind the wheelwell I didn't have the inner fender set in place, less room than I had planned on.
All I can think of right now.