Engine jitter when the idle speed of the car is 600 rpm.

1. If it is a gasoline engine, a car idling at 600 rpm is abnormally low. Under normal circumstances, the idle speed should be around 800~900 rpm.

2. If it is a diesel engine, it is normal to idle at 600 rpm.

3. For gasoline engines, the low idle speed may be due to the following reasons: the throttle is too dirty. In this case, it is necessary to clean the throttle.

4. Idle speed control valve is faulty. This problem is not common. If this is the problem, the idle control valve needs to be replaced.

There is too much carbon in the cylinder. This phenomenon is also relatively common, and the solution is to clean up the carbon deposits.

6. The fuel injector is poorly atomized or blocked. In this case, clean the fuel injector first. If cleaning doesn't work, only the fuel injector can be replaced.

7. There are impurities in the oil circuit. Many car owners will go to some informal gas stations to refuel in order to save some money. There are many impurities in inferior gasoline, some of which are mixed with water.

8. Changes in oil viscosity. Solution: Replace the appropriate oil, please refer to the vehicle instruction manual, and there will be clear instructions.

9. Idle speed can be adjusted. Generally, it is adjusted by adjusting the throttle opening and idling fuel supply. If you have special needs, please go to 4S shop or professional auto repair shop for professional help.

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