Sooner or later, every motorist faces the problem of replacing the catalyst, since, in fact, it is a filter. And each filter is known to be clogged, although very often the catalyst breaks down even earlier because of poor-quality gasoline, or because of mechanical damage. And at first glance, it seems that there is no problem and no, replace the old catalyst with a new one and that’s it.
But optimism disappears when it turns out that a new, original catalyst is worth a lot of money (on average), besides on some cars there are 2 or even 4 catalysts. Therefore, it is worthwhile to understand whether it is necessary at all? Its main function is to convert toxic gases into harmless ones, but the toxicity standards in our country allow the use of an exhaust system without a catalyst, and because of the honeycomb structure it increases the resistance of gases, which in turn reduces the engine power. It turns out that, in fact, a catalyst in our country is not needed.
Removal of catalyst
Many motorists ask a question, why then it is simply impossible to cut and remove the catalyst and weld into its place a piece of pipe or the corrugation of the muffler? The fact is that, firstly, in addition to its main function, it reduces the noise level, therefore, in its absence, the exhaust system will work more noisily, and also reduces the temperature of the exhaust gases and, in its absence, other parts of the exhaust system located after it Quickly burned.
Secondly, on cars with norms of Euro 4 and more, after the catalyst, another diagnostic lambda probe is installed, which checks the efficiency of its operation, and in case of its absence, there will be an error and the car will be unstable. Consequently, in cars with rates of Euro 4 or more, a “brainwashing” or installation of “deceptive” lambda probe is necessary. Therefore, you can not simply remove the catalyst. There is a question, what to do?