i have just change my battery and after changing my battery..my RPM dropn to 400 when the car is idle and the whole car vibrate like crazy..before i change the battery my car RPM is around 800 plus....what happen to my car..izzit that when i change battery my ECU tend to reset it self? so do i need to reset or DYNO my car?by the way..i am driving a kelisa..so anyone can help me?