The second generation exhaust pipe of Changan Star emits black smoke and consumes a lot of fuel. What's the matter?

Black smoke from cars shows two problems:

1 There is something wrong with the throttle.

Spark plugs and ignition wires also need to be inspected and replaced.

2. There is something wrong with the carburetor, and high fuel consumption also proves that there is something wrong with the carburetor.

In addition: incomplete combustion, lack of cylinder, too rich mixture and poor air intake may all cause black smoke.

It is recommended to clean the oil circuit, carbon deposit and throttle to see if the throttle is installed correctly.