Measuring the value of exhaust gases
Elevated emissions can cause your car to fail MOT regardless of whether it”s a petrol or diesel. Many drivers are wondering where and how they can now check if the car will pass the technical inspection when it comes to exhaust gases. The only option is to pass a full MOT and pay the full price. In this way, you will be sure that your car is ready and correct for a regular technical inspection.
Elevated values of exhaust gases and environmental protection
With the increase in the number of motor vehicles and the intensification of traffic, the impact of exhaust gases on the environment increased. The Western Industrial Society has been since 1968. started limiting the emission of harmful gases from motor vehicles. The United States of America played a leading role in that legal process. The legal limits of the emission of harmful substances were constantly tightened. In order to meet these requirements in everyday life, a diagnostic system has become necessary to monitor the operation of the components and the system as a whole responsible for the composition of exhaust gases. Elevated values of exhaust gases certainly affect the environment, so control is necessary, especially on older vehicles.
Increased exhaust back pressure
Increased values of exhaust gases
Decrease in engine power caused by increased back pressure of exhaust gases – Uneven operation caused by increased back pressure of exhaust gases was detected. In these cases, the catalyst can be so damaged that its free surface has become insufficient, there is an increase in the back pressure of the exhaust gases and a significant reduction in power. When diagnosing the error, it should be checked whether the back pressure of the exhaust gases has increased. To do this, the front probe should be removed and the pressure should be measured using a precision manometer. The back pressure of the exhaust gases is usually around 0.2 bar.
Rules for elevated exhaust gas values
Vehicles with a compression ignition (diesel) engine, after the engine has reached the operating temperature prescribed by the vehicle manufacturer, must not have a mean light absorption coefficient of the exhaust gas higher than the value prescribed by the manufacturer and declared according to uniform technical conditions. Vehicles that use more than one type of fuel must meet the above values when using each type of fuel. The exhaust emission of motor vehicles with internal combustion engines, upon first registration, must meet the requirements of uniform technical conditions. On motor vehicles, which meet the conditions prescribed by the
Defective DPF filter
A clogged DPF prevents the flow of exhaust gases and raises the pressure in the exhaust gas treatment system as well as the concentration of soot, which causes fouling and failures in other parts of the engine. Vehicles that have an engine fault and the check engine red or yellow light is on, which indicates that there is an engine fault, are often unable to initiate even a forced regeneration or their engine computer program remains stuck in regeneration. This case is dangerous for several reasons, and the symptoms are the frequent activation of the engine fan, increased consumption, irregular engine operation, excessive amounts of fuel on the injector responsible for injecting fuel into the exhaust manifold during regeneration, increased oil level and oil pressure in the engine (mixing of fuel with In the event that the system remains permanently in the process of regeneration, serious breakdowns and engine failures can occur, and often even a fire on the vehicle. That is why it is important to visit the service as soon as possible in order to avoid serious damage.
