Working on a 2003 Sierra, originally a 4.8 swapped in a 5.3 .. Installed a Trailblazer ss intake manifold, small truck Norris cam
Loaded in a stock 5.3 tune worked on the throttle body scalar ,deleted rear O2 sensors ,made changes to base idle airflow etc
Runs down the road well but stalls a minute after it comes to idle, Disabled throttle cracker to stop hanging throttle.
was throwing code p0101 intermittantly so I replaced maf sensor. Still stalls sometimes. code returns .
From cold start during warm up still in open loop fuel trims go crazy from taking fuel out to adding fuel and will stall
attached is the last read from ECM and a couple logs If someone could have a look and point me in the right direction that would be
appreciated Thanks