Suzuki Swift is shaking badly.

In general, the causes of car jitter are: 1. The most common cause of serious engine carbon deposition leading to automobile jitter is that the throttle valve is too dirty or the fuel nozzle has too much carbon deposition, which leads to idling jitter after cold start. 2. Check the working conditions of spark plugs, high-voltage lines and ignition coils to see if there is any problem with the ignition system. Poor ignition system and poor spark plug fire can also lead to such problems.