When lifan 620 is idling, the unstable intake leads to engine jitter.

Unstable idle speed: 1. Check whether the engine has no cylinders.

2. Is the air inlet pipe leaking?

3. Idle execution failed.

4. Throttle or air inlet and idle motor are blocked.

5. Fuel pressure and nozzle failure

6, ignition wire high voltage coil

7. Three-way catalytic plugging

And so on, it is recommended to go to the maintenance point for inspection, and don't blindly start from a small problem and turn it into a big problem.

Pay attention to the engine sound. If it is too loud, turn off the engine and ask for a trailer.

I hope I can help you. Have a safe trip. Ask the car master. 4S shop professional technician, 10 minutes to solve.