What if Chery QQ idling is unstable?

After the cold car is finished, it is about 1000- 1200 rpm, and it will drop to 700-800 rpm after the temperature rises. If you turn on the air conditioner, it should be around 800- 1000 rpm. There should be something wrong with your car.

There are many reasons for unstable idle speed:

1, poor gasoline quality;

2. Ignition system problems, insufficient high-voltage electricity and weak ignition ability of spark plugs;

3. The interior of the fuel system is dirty, and there are many carbon deposits (choke is blocked or leaking, throttle valve is dirty, intake pipe is dirty, etc. );

4. Engine jitter caused by insufficient cylinder pressure;

5, engine foot glue aging and other aspects will lead to engine instability.

Suggested treatment:

1, cylinder pressure test (there should be no problem);

2. Clean the fuel system immediately without disassembly (gasoline part: injector, combustion chamber, three-way catalytic converter, etc. Air part: throttle, intake pipe, combustion chamber, etc. ) and use the decoder to read the data stream to see if it is normal. This step can effectively solve many disadvantages in the system, such as removing carbon deposits, eliminating idling instability, improving engine power, reducing fuel consumption and exhaust emissions, and reducing the possibility of automobile knocking.

Note: If some slight jitter is normal, I hope this is the reason. Generally speaking, it's not a big problem. Just go to the store and check it out.

According to the above methods, we will get satisfactory results. I hope the above answers can help you.