Any help would be appreciated. Have a 2016 6.2 gm truck with Procharger installed. Original flash was Diablosport and truck ran decent except for WOT where there heavy stumbles on shifting.

Just built a new EFI Live tune for both the E92 ECM and T87 TCM, an expert tuner helped me. TCM tune was stock and flashed very nice. The ECM Diablosport tune was another story. I had the checksum issues and stranded me at a parking lot for about an hour with a ECM with no calibration. V7.5 would not allow me to flash it either since the ECM with checksum error could not be read.

Was told to go into the new tuning file and access the red folder with the V2 connected to the vehicle and change the checksum to 65535. I did this, tried a cal-flash and finally the truck accepted the tune successfully however it still would not start. Retried with a full flash, then the truck started. As I put the truck in gear and started to drive it stalled. Upon cranking, it fires intermittently but struggles to start. Ignition cycling and modulating the accel pedal like crazy got it going eventually. But in order to keep it running you have to keep it well above 1500 RPMS. Then driving I have to manually shift it to keep the RPMs high because if I leave it in D, when I slow down the engine stalls and won't restart without the ignition cycling and accel pedal pumping.

Wondering if this is a VATS issue or a table that needs adjusting like idle speed?

The old Diablosport tune that ran well overall had slightly higher idle in the tables, on average about 100 RPM.

Any thoughts on this?