What's with the stuffy and buzzing engine sound?

The engine of Pacific Auto Network may have a dull rumbling sound, or it may have a clicking sound, which may be made when the car is cold-started, or it may be made when the carbon canister solenoid valve is working. These two clicking sounds are not serious and need no maintenance. If the abnormal noise is caused by carbon deposition, the owner will go to the 4S shop for cleaning and maintenance.

When the engine makes a dull rumble, it may be caused by serious carbon deposition in the engine or abnormal operation of the cylinder. Car owners can go to the 4S shop to clean up the carbon deposits. In addition, the owner can also check the following parts of the car.

1, vehicle air intake system, observe whether the air filter is too dirty, whether the vacuum tube is aging and leaking, and avoid affecting the air intake by cleaning the throttle.

2. Check the exhaust system of the vehicle to see if the three-way catalyst is blocked, and clean or replace it in time.

3. Check whether the oil with inconsistent label is used. If you add too much oil, the engine will be very dull.