Black Smoke from Exhaust of Car

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Black Smoke from Exhaust of Car

Black smoke from the exhaust of the car comes out while driving. The possible reasons for black smoke from the exhaust is a clogged air filter, bad fuel injector sensor (throttle position sensor, coolant temperature sensor, and mass airflow sensor).

Clogged air filter
Black smoke that comes out the exhaust is an indication of too much gas burned inside the engine combustion chamber. The most common reason why there is black smoke from the exhaust is the clogged air filter. When the air filter is clogged, enough amount of air will be restricted from going inside the engine making the air/fuel to become reach (too much fuel with not enough air).

Black Smoke from Exhaust of Car

White Smoke From Exhaust
If there is white smoke comes out from exhaust while the engine was running at any engine temperature like when its cold, warm or hot then it means that there is a problem with the engine.
Learn more: White Smoke From Exhaust

Open the hood of the car and locate the air filter, refer to the manual covering the vehicle model if you have difficulties finding the air filter. Remove the air filter and examine closely if there is too much dirt present on the filter, if there is too much dirt then this is what restricting replacement parts from going inside the combustion chamber that is why the air is insufficient and the fuel is too much.

Replace the air filter. This should fix the problem. Any auto parts have an air filter for their inventory so nothing to worry about where to find replacement parts.

Bad Fuel Injector Sensor
This problem is only possible for cars with fuel injection systems. Usually, the problem for this system is the electronic sensors that measure various engine factors in which the car computer system is used for calculating the amount of fuel that must be injected on each engine cylinder. If one the sensors are faulty then the wrong data will be sent to the car computer and the air/fuel mixture will be wrong which in this case the fuel is too rich.

There are three sensors that when faulty can cause black smoke, the sensors are throttle position sensor, engine coolant temperature sensor, and the mass airflow sensor.

There is only one way to determine if the sensor is faulty, this is to hook up the car to an engine analyzer. The engine analyzer will display trouble codes that can be used to determine if the sensor is the problem. With that said, bring the car to a reputable car shop to have the engine analyze with an engine analyzer. This kind of job is costly. If one of the sensors is bad, just replace the sensor to fix the problem of black smoke.

Engine Diagnostic
Engine diagnostic guide for car engines common problem from a technician experience, this will serve as a guide to solve your common engine problem, please feel free to read out the engine diagnostic articles.
Learn more: Engine Diagnostic

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