UPDATE
So after trying almost everything I asked the mechanic about the old engine, he still had that in his store, i requested him to swap three item from old engine to new, MAP Sensor, Throttle body and injectors.
To my surprise the size of old sensor was much smaller, injectors were serviced and so was the throttle body.
Alhamdulillah now easily getting 13.5 with Ac in local, switched to Havoline 10w30.