Y62 2020 Supercharged torque issue

Hi All,

having an issue which i think is related to torque managment tried compairing 2 y62 tune files but cant see what it would be nothing stands out, car was tuned by someone to be Caravan towing safe and gearbox safe but its uselsss offroad now, tuner is other side of the city and dosnt want to help

idel to 2400rpm any load large or small it pulles all timing showen on scan gause 0-3deg soon as it gets past 2400rpm timing jumps to 12deg and goes up from there.

Basicly put the car in 2wd and you cant even do a skid

when offroad in high range in sand and soft 1st gear you cant even move and it wont spin the wheels basicly v8 is uselesss with zero torque under 2,400rpm.

Uploded file of the tune

why dont you revert it back to stock and work a new tune from there

It?s pulling timing based on IAT