In need of help after performing delete;
Initial start up did not have spark, put jumper wire to ground on coil bank connector after visually inspecting all known connections, engine started ran rough, and got codes P0010, P0107, P 0122, P0222
Prior to the AFM/Dod delete it ran fine and no issues except stuck #4 lifter and slight drop in oil pressure
Did complete delete, PCM reprogrammed (by Brendan Patten from this site, great guy!), new non DOD lifters and GM cam (not high performance) removed oil pan replaced pick up tube O ring, replaced VLOM with cover blocking solenoid ports.
Upon start up no mecanical noises, oil pressure restored, would run about 5-6 seconds roughly and then reduced engine power and shut off. Would have to clear codes to restart.
The delete was performed in vehicle (2011 Tahoe 5.3 LMG), I was careful when moving wiring, disconnecting etc.
Have cleaned grounding strap and hardware and reattached (rear driver's side of block) same on passenger front side of block.
Everything seems to be hinged on a ground issue.
G102 (under exhaust manifold near cyl #3) feels tight and wasn't removed before.
I have looked at countless videos, diagrams and so forth trying to see problem areas others may have experienced with grounds.
Since there was no ground of the coils I tried to find a ground distribution diagram to see if any of the other issues (throttle body/sensor, map sensor ) have a "shared" ground to help isolate the location to reduce searching. I understand things break, I don't think as many issues as I have had all just failed since I began this project. Like many I have limited resources (hence the reason I was doing it myself) so just replacing parts in suspect systems is not my first choice. Been beating myself up on what I could have missed, I believe it will be something relatively simple to fix once found. I am not a mechanic, I am just an old disabled vet trying to fix his truck. Any suggestions would be greatly appreciated.
UPDATE- Issues Resolved
One of the connectors to the ECM had not seated correctly. I had connected the one in question twice myself and my son once while diagnosing. If I had to bet the farm if it was seated correctly I would have. I took extreme care around those connections. It took a third set of eyes (and expertise) to identify it. The number and variety of DTC's fluctuated with almost every start attempt. I am imagining the the multi pin connector in my mind moving from side to side making contact, then not, energizing some items ,starting then the vibration of the rough running motor amplifying the problem by sporadically making contact of different pins. The sheer randomness of the codes made me think major ground short or ECM issue, something that would affect many sensors at once. On a couple attempts I had no rpm or oil pressure indication when I did before. At one point there were 6 active DTC's and 9 pending, and as I mentioned before they were constantly changing adding to my confusion. I cleaned/inspected every ground and connection/wire I could see. The mechanical portion was a little bit of a challenge, so far no issues and all codes gone. I had never disconnected an ECM before this AFM/DOD delete. My Tahoe was purchased from a coal mine foreman here in Kentucky. The plastic splash shield under the front of the engine had broken at some time and was never replaced by previous owner. The lever action on the connector was binding somewhat, did not feel smooth as I thought it should, got enough positive feedback to make me think all was fine. Although not caked in mud , the constant use on coal dust roads didn't help. I used dry brushes on the plastic lever assembly to clean before disconnecting. This long story has come to an end. Take more care than I did around those connections. If you get "engine power is reduced" and multiple codes (many unrelated) think about addressing that connection. I want to thank LT1swap.com and Brendan as well as this site for all the help and advice this old man needed.