In the material below, we will touch on the specifics of using a gas analyzer – a device for assessing the quality of combustion of automotive fuel and where to scrap your car. Thanks to this device, you will be able to quickly and accurately assess the composition of the exhaust gas, which will answer the question of how well the engine works. For this purpose, five or four-component gas analyzers are suitable.

Strict standards have been adopted for the toxicity of exhaust gas for the percentage of the following elements and compounds in it:

oxygen;
hydrocarbon;
Carbon monoxide;
Carbon dioxide.
If you operate your vehicle properly and have it serviced at the right time, you have nothing to worry about. Toxicity of exhaust gases of a car should correspond to norms.

Components of car “exhaust”
Let’s talk about the components that make up the exhaust gas.

Hydrocarbons (CH) are components of the fuel that are not burned during the vehicle’s operation. If the engine is functioning properly, almost all the fuel is burned without residue. If the content is higher than normal, it indicates a malfunction. Perhaps there is too much oil flowing through loose piston seals, or there is a problem with the ignition.

More often than not, the exceedance is due to ignition skips when not fully burned fuel is fed into the exhaust tract. The cause may be:

Breakage of the high-voltage spark plug wires;
Dirt on spark plugs;
rotor breakage;
distributor cover;
electronic module;
ignition coil;
ignition advance angle violation;
breakage of the crankshaft position sensor;
Operation of the engine on a “lean” mixture, which in principle is poorly ignited;
improper operation of the engine itself (if the exhaust pipe is leaking), etc.
In the case of a diesel, flushing the fuel system of a diesel engine may help.

It also happens because the engine is not warmed up enough, because the fuel burns worse in the cylinders due to the condensation of petrol vapors on their surface. The result is an increased amount of CH in the “exhaust” and uneconomical cycle of the power plant. To eliminate the problem we recommend contacting the experts for a complete diagnosis of the engine in St. Petersburg.

Carbon monoxide is an unstable chemical compound. After combining with oxygen molecules it turns into carbon dioxide. If there is a lot of carbon dioxide in the “exhaust”, it is a positive sign. It means the engine is working properly. The opposite picture will be with the wrong mixture formation.

The carbon monoxide content should not exceed 0.5%. If it is higher, there can be several reasons:

dirty air filter;
improper operation of the crankcase ventilation;
too much fuel pressure, etc.
As a result, the combustible mixture either contains too little oxygen or too much gasoline. The resulting mixture is not fully combusted, hence the excessive CO.

Gas reading

The final data shown by the gas analyzer, do not always give an accurate picture of the performance of the car engine. After all, the components also influence each other.

Excess oxygen – the main indicator of the quality of the engine on the lean mixture. In fact, due to poor tightness of the exhaust duct, the amount of oxygen in the “exhaust” increases noticeably. This will lead to the fact that the gas analyzer will give inaccurate readings, concerning the alleged “lean” mixture. Therefore,┬ádo not forget to check the tightness of the exhaust duct.

Such a check, as well as other locksmith works, should be entrusted to professionals.

Nitrogen oxide appears in the combustion chamber at high pressure or temperature above 1370 degrees. It reacts with unburned fuel components, resulting in “photochemical smog” under the influence of sunlight, harmful to humans. Nitrogen monoxide content will be accurately measured by a five-component gas analyzer.

Increased values of content will indicate the “depletion” of the mixture, or too much heat in the engine. In this case, it is worth carefully inspecting:

the cooling system of the power unit;
assess the correctness of the valve operation;
the quality of pipes in the system of recirculation of “exhaust”;
correctness of fuel supply.