When taking the vehicle to the Technical Vehicle Inspection, the most common thing is to make sure that different aspects of the vehicle, such as brakes, tires, among others, are in optimal conditions. It is not necessary to leave aside the polluting emissions of the vehicle since it is a fundamental aspect to pass the ITV, since it is a frequent cause of rejection that the vehicle has not passed the gas test.
Unfavorable ITV due to excess smoke
The exhaust test is one of the most difficult tests to pass for those who use diesel-powered vehicles. After the operators test our car, we have all obtained an unfavorable ITV for excess smoke, as the verdict dictates. But there is a rather interesting (and legal) trick that it does because this inspection comes out successfully.
This, as such, is a very common scenario: a high percentage of unfavorable MOTs are for this reason, in addition to lighting defects such as turn signals or burnt-out brake lights.
When this happens, we must be quick to solve the problem with our car and pass the ITV again, since in cases of an unfavorable inspection, technically only we are authorized to drive from the ITV to the workshop and vice versa. For this reason, and as something to consider, we can opt for a simple method for it.
so you can do it
As such, we are talking about a contamination test at the ITV station that will vary depending on the type of mechanics it has. For example, for the gasoline, is a gas test in which carbon monoxide is measured, which is produced as a consequence of the combustion process. Basically, what is measured is whether the air and gasoline mixture in the engine is correct.
In the case of a motor vehicle dieselthey are tested for smoke opacity, controlling that the emissions and carbon levels are within the legal parameters. And how can we do it so that the result is successful?
Well, demand more from the engine to get a better result. But do not demand it in any way, but through the different electrical systems installed in your vehicle. When we activate electrical elements such as dipped lighting, the heated rear window or the air conditioning system, what we are actually doing is demanding more power from the engine, which it develops by injecting more fuel into the cylinders. When this occurs, combustion becomes cleaner and more energetic.
Or you can go a few kilometers to warm up the engine well
Another of the foundations to which we can refer is none other than that of pre-warm enginealthough it is a process that can be done before having required the engine, as we have seen in the previous lines.
This is for no other reason than because the engine temperature has to be appropriate. When the engine is cold or warm, this affects the operation of the catalytic converter and, therefore, the engine’s fuel system (which may affect the final result). The engine in this state consumes more fuel and emits more gases than usual.
This is why you should take your car for a spin before going to the ITV workshop, and drive for a few 20 to 40 kilometers so that the engine is very hot before coming to the test.