Hi there all. I have a 2014 ford kuga 1.6 ecoboost. I have done the software remapping on it in February 2019 and car was pulling like a bomb. I recently had an exhaust leak on the outlet side before the turbo which i had to remove the turbo to repair this. During the time i did the downpipe on it as well and had the CAT removed. After all was put back together the car is not pulling like it was and sometimes engine light comes on showing O2 sensor issues. Car is also jerking from time to time. Is there any advise of what i can look at?