What's the matter with too much fuel injection of the Earth Eagle King 400?

The reasons for excessive fuel injection are as follows:

1, poor atomization of fuel injector: engine power drops, black smoke is emitted from exhaust, and the machine runs abnormally.

2. Needle valve is stuck: water or acidic substances in diesel oil will make the needle valve rust and stick. When the sealing cone surface of the needle valve is damaged, the combustible gas in the cylinder will also run into the mating surface to form carbon deposit, which will make the needle valve invalid and the injector lose its injection effect, resulting in the cylinder stopping working.

3. Oil dripping from the injector: When the injector is working, the sealing cone surface of the needle valve body will be frequently and strongly impacted by the needle valve. Due to the continuous injection of high-pressure fuel from there, the cone surface will gradually wear or appear spots, resulting in oil dripping from the injector.

4. Too much carbon deposit: too much carbon deposit in throttle or engine leads to too much fuel injection.

5. Imbalance of mixture ratio: When the oxygen sensor fails, the mixture ratio will be out of balance, which will easily lead to an increase in fuel injection.