Good news... I found a good mechanic finally... My car had multiple issues...
1) Tappets needed to be adjusted (in micro level)
2) Throttle body replacement (butterfly defectiveness). I had one with me, so replaced it with the one i had
3) Timinig valve was working fine... but it was also checked.
4) One vacuum pipe was leaking...
5) plug seals and tappet cover seal was replaced.
After completing these tasks, he tested my car's mixture CO ratio and wolla... My car was just as I wanted...
This mechanic is really pro guyzzz...
Anyone want to visit him, let me know then...
Thanks everyone.