2010 Silverado 4x4 6.2l with tsp vvt 1.2 cam. this is very strange and i would really appreciate any help. after installing my cam during tuning maf only wot it would intermittently go super lean at wot. once it did it it would stay lean on future pulls for a while then clean up and come back. so i tuned in sd only to get my fueling correct in the vve tables. while i was tuning the wot in sd i had the same glitch happen a few times. in sd mode it only happens for a split second around 5200 rpm at wot. dynamic airflow and cylinder air mass show 0 in the scanner but the maf and mad are reading normal. the bank 2 injectors drop out and spark pegs over 50 degrees. you can feel the truck jerk when it happens
log file (5200 rpm glitch) in in sd only mode look at time stamp 13:41.88 at about 5200 rpm
log file (maf only wot) in maf only look around time stamp 6:05.66 went lean winding out 3rd gear
I don't know if the ecm is going bad or what..checked over all my grounds and i think it has to be the ecm or the software