Cars Q&A

hello I have santro xing 2006 model car which is having issue. After starting the engine car starts vibrate and shaking and stops not all times but sometimes. during journey car starts shaking. after visit to service station technician replied that the crank shaft and the pulley have to change that costs more due to bad timing control of that section these problems are showing according to the technician. I dont know what to do, suggest me.