In recent years, The sale of new diesel cars in Spain has decreased because this type of automobile increasingly has more environmental restrictions, especially since only diesel vehicles can obtain a DGT label if they were registered after 2006.
On the other hand, sometimes drivers of these diesel vehicles find that in black smoke starts coming out of the exhaust pipeso they worry because they do not know the reasons for this situation, a problem that often means having to go to a workshop.
What are the causes of black smoke coming out of a diesel car?
Firstly, it may be due to the fact that the car is driven around the city a lot and at low revs, as this causes the gas recirculation (EGR) system to become clogged and prevents the particulate filter from regenerating correctly. Therefore, the process combustion is incomplete, which causes black smoke to appearas there is unburned diesel.
Black smoke may also appear if there is excess fuel or lack of air in the mixture that occurs in the combustion chamber, so it will be necessary to carry out a check of the air filter, the injection pump and the fuel intake ducts.
What noises after turning off the engine should not worry you?
First of all, if you hear a metallic sound it is a very common situation, since when an engine is at full capacity, the temperatures reached inside can reach up to 700 degrees in parts such as the exhaust pipe, so When you turn off the engine they cool down and Because some pieces are made of metal they begin to creak.
Besides, It is also very normal to hear the radiator fansince it is used once the car is stopped to cool the particulate filter or to stabilize the coolant level, so we should not worry about this noise unless the fan continues running for more than three minutes, as this can mean a breakdown.
What are the functions of the car catalyst?
This part, which all new cars must have, has a variety of uses. Its most important function is to reduce polluting emissions generated by the enginethat is, it converts the toxic gases produced during combustion into gases that are less harmful to the atmosphere.
It is also used to control the number of emissions and ensure that they comply with Euro regulations. On the other hand, the catalyst is usually placed just before the exhaust pipe, and uses precious metals, such as platinum, palladium and rhodium, to cause chemical reactions in the exhaust gases and thus, reduce their toxicity before they are expelled into the atmosphere.
#black #smoke #diesel #car #reasons
