Welcome Master Ding, the auto mechanic, to join Chen Gong in the car chat. Master Ding has more than 20 years of experience in auto repair, and has always insisted on fighting in the front line, keeping up with the development of the auto industry market, and enthusiastically solving the problem of car use for the majority of riders. Join Chen Gong to chat about cars and become your car purchase consultant. You can scan the QR code at the end of the text and ask him questions.

Mr. Chen's Q&A today

Q

Hello, Master Chen, I can't turn my Beiqi m20 at idle speed 1000. I changed the front oxygen sensor, spark plug and idle motor. Is the three-way catalytic converter clean or idle at high speed? The water temperature sensor is broken, and the car fault light is not on? Thank you for your answers!

A

You're right. The water temperature sensor is inaccurate and will not give an alarm. You'd better check it with dynamic data stream. When the idle speed is high, there are several things to check. Vacuum leakage, electromagnetic interference, (spark plug, cylinder line, ignition coil, etc. ).

Q

Excuse me, Mercedes-Benz e230 in 2007, driving 150000 km, passed the annual review. Do the fuel pump and filter elements need to be replaced? Can 92 oil be used? What other precautions are there?

A

Passing the annual review is not equal to the combustion quality. The engine is qualified when it is burned too thinly, but the power will not be too good. After running so much, always check the fuel pressure and combustion. No.92 oil can

Q

My 14 emgrand is over two years old. I found an abnormal sound in the central control two days ago. I bought a central control soundproof strip online. When installing, I found that the distance between the front windshield and the center console is different, and the gap on the left is about 0.5 cm larger than that on the right. I want to ask if it will affect the car!

A

This is a manifestation of the poor tooling level of domestic cars. This gap will take ten years to catch up. Therefore, buying a domestic car requires some psychological preparation.

Q

20 13 2.0t LaCrosse 13w km, the shift is not smooth and sticky, the fuel throttle slightly shakes, the acceleration is weak after the two ignition coils are damaged, and the engine sounds a little low-frequency noise. Is there any saving?

A

There is nothing fatal wrong with your car. Is the lack of correct maintenance methods. There is nothing wrong with the engine. The faults you mentioned are all caused by the symptoms of carbon pollution in the engine, which is a derivative symptom. I suggest you clean the air inlet and combustion chamber to solve the problem completely.