Suzuki Swift 1.5 manual version of the cold car began to shake. What's going on here? Please help and analyze. Thank you.

If the engine oil problem is ruled out, it is caused by carbon deposition, such as throttle carbon deposition. Generally, high-speed engines should be cleaned if the shift speed is relatively low, generally about 30 thousand kilometers, or adding fuel additives regularly at ordinary times can relieve the symptoms appropriately. It's best to clean the throttle, or buy two bottles of additives to improve the running speed.

If you step on the accelerator to accelerate, shake or jump, there may be something wrong with the ignition system. It is recommended to check the spark plugs.