A bad EGR valve would be the first place to look, because the EGR was invented to kill NOx. Improper engine timing, a lean air fuel mixture, and problems with the cooling system can also increase NOx.
Bad EGR, Exhaust Gas Recirculation valve. That is what reduces NoX emissions
Nox is The abbreviation of Oxide(s) of Nitrogen. These are only produced at high burn temperature's. In a modern engine excess Nox emissions can be caused by a lean fuel mixture caused by a failed O2 sensor(s) Or A failed or pluged EGR valve
Several things can cause high NOx: lean mixture, bad 02 sensor,exhaust leaks before the catalyst, a defective catalyst, high engine compression (carbon buildup), are among the most common.
The engine is burning fuel.
the oxygen sensor is in the exhaust manifolds, there should be one for each side
Petrol engines produce oxides of nitrogen (NOx) as a byproduct of combustion at high temperatures. Specifically, nitrogen in the air reacts with oxygen in the engine's combustion chamber to form NOx gases. Factors such as high compression ratios and combustion temperatures can contribute to increased NOx emissions from petrol engines.
High CO levels can increase the formation of nitrogen oxides (NOx) through reactions with nitrogen in the atmosphere. This leads to increased NOx levels in the air. However, if CO concentrations are high enough, the combustion process in engines can be inefficient, leading to incomplete combustion and higher CO emissions.
nox is from exhaust temps too high or a cat. convertor breakdown.
Nitrogen oxides (NOx) are produced in a petrol engine when the high temperatures and pressures cause nitrogen and oxygen in the air to react. The combustion process in the engine leads to the formation of nitrogen monoxide (NO), which can further react with oxygen to form nitrogen dioxide (NO2). These compounds are collectively referred to as NOx emissions.
SOx ana nox
Kara Nox is 5' 4".
Polypoetes nox was created in 1909.