My BYD's speed-sharp automatic manual 14 car will shake when starting at traffic lights or flat roads. What is the reason? I only walked 70,000 kilometers. Thank you for your reply.

The main reason for the jitter during manual and automatic gear shifting is that the throttle valve has more carbon deposits; It may also be caused by poor oil distribution and cooperation.

The carbon deposit at the throttle prevents the air from entering according to the opening of the throttle, which leads to the imbalance of air-fuel ratio, so the jitter phenomenon occurs. It should be noted that when cleaning the throttle, you can't just clean the throttle. The throttle idle valve must be disassembled and cleaned, and the bearing of the idle valve must be lubricated.