Why is the water well driller underpowered and emitting thick black smoke

Insufficient engine power, uneven speed, exhaust pipe exhaust black smoke phenomenon has two kinds:

one is continuous exhaust black smoke; another is intermittent exhaust black smoke, and the engine shaking shock. Engine power and continuous exhaust black smoke is the engine most cylinders or all cylinders have too much oil supply, fuel, and air mixing ratio is out of proportion, combustion, serious lack of oxygen, diesel fuel combustion is incomplete, suspended free carbon with the exhaust gas with the formation of the discharge.

If the exhaust pipe is intermittent black smoke, and accompanied by a “muttering” sound, indicating that the individual cylinder combustion is incomplete.

Summarize the reasons as follows

① Injector pump debugging is not appropriate so the amount of oil supply is too much, incomplete combustion.
② Most of the injector injection quality is poor.
③ The oil supply is not correct.
④ Insufficient air intake due to reduced height and delayed opening of the intake valve.
⑤ The air filter element is too dirty or the air filter is installed incorrectly, resulting in poor air flow.
⑥ The supercharger's boosting effectiveness is reduced.
⑦ The fuel quality is too poor.
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