Finally, i start loving my vitz drive. no vibration at all. I was inspired with the post of @ngen. i was really fedup with this car and decided to do it my self. I have cleaned all the sensors, connectors, throttle body and throttle body rubber valve. 95% of my vibration gone after doing this. i was so happy but after few days i started feeling a little vibration in my car again. Ngen advise me to go for fuel filter change. I opened the rear seat and took out the fuel pump with filter, and it was not clogged and i clean the filter slightly and fixed it back. Then i decided to inspect all wiring which are coming from the ECU. i removed the battery with its support stand and what i saw that the foundation rubber is completely broken into 2 pieces. Foundation was inspected before by Toyota rawal motors and few other EFI good mechanics and they all said it is fine. So that was my issue. After replacing the foundation from saddar, now my feeling is that i am running a new car. Thankssssssssssss Everyone and especially ngen bhai.