Why is the cold car jitter of Xichai 485 engine very harmful?

Friends read your narrative; A few seconds after the cold car started, the engine shook violently. Check several aspects that are easy to cause this phenomenon. 1. Whether the spark plug in the ignition system has high voltage and weak fire mainly depends on whether the ignition is weak or not, which is mainly related to the spark plug.

2. Whether the idle air intake is smooth and the idle valve is dirty, there will be a lot of dirty things on the spool and valve seat of the idle motor. When dirt accumulates too much, the engine will have low idle speed and poor idle stability.

3. The oxygen sensor and water temperature sensor are not easy to use, which leads to computer judgment error and long fuel injection time. The possible reasons are that the oxygen sensor and water temperature sensor are broken or ineffective, and the air cabin is too dirty and the air intake is not enough, which leads to the wrong judgment. Need professional testing instruments.

4. The throttle valve is too dirty, and the large opening leads to long fuel injection time.

5. The nozzle is not tightly sealed, oil drops when it is not working, and the oil pressure is too high due to dirty or bad oil pressure regulator.

If there are problems in these aspects, your situation will appear. According to my analysis, I will go to the repair shop for on-the-spot investigation and judgment. I wish you an early troubleshooting.