How do I get rid of NOx?
One way of controlling NOx emissions is to use low-nitrogen fuels. Another is to modify combustion conditions to generate less NOx. Flue gas treatment techniques, such as selective cata- lytic reduction (SCR) processes, can remove NOx.
What causes a car NOx to be too high?
If the cylinder head has been machined too much, it can change compression resulting in higher temps and higher NOx. 5. Malfunctioning cooling system. Higher engine temps = higher NOx. Make sure the cooling fan is working. 6. Defective catalytic converter.
Why does my Honda Accord make a noise when I start it?
The noise lasts for approximately two seconds and sounds like the timing belt system is ratcheting into place. This only occurs on a cold start, meaning the engine has not been running for 4 or more hours. I have had this problem for over a year. An internet search located honda service bulletin 09-010 dated 08/17/10 and then updated on .
Why does a lean fuel mixture cause high NOx?
A lean fuel mixture exists when less fuel then required is delivered to the combustion chambers or when more air then necessary is added to the fuel. In either case the lack of gasoline needed to cool the combustion chambers down is not present. Combustion temperatures increase causing high nitric oxide emissions.
What causes a car to have high nitric oxide?
In either case the lack of gasoline needed to cool the combustion chambers down is not present. Combustion temperatures increase causing high nitric oxide emissions. A lean fuel condition may be due to a vacuum leak/s and/or defective fuel control components, such as the Air Flow Meter, Engine Coolant Temperature Sensor, and O2 sensors.
Why does my car have a high NOx reading?
A 2nd website said, “High NOX emissions are almost always due to a defective EGR valve (or some component that controls the operation of the EGR valve). A related symptom that usually occurs when EGR is lost is spark knock (detonation) during acceleration.”
Why was my NOx too high on the smog test?
The only emission that was above the limit during the smog test was NO, however both HC and CO measurements were about halfway between “average” and maximum. A 2nd website said, “High NOX emissions are almost always due to a defective EGR valve (or some component that controls the operation of the EGR valve).
What to do if your car fails the NOx test?
If you own a non-EGR equipped vehicle, and have failed the emissions test for high NOx, pay close attention to the Catalytic Converter. Read about Catalytic Converter
What causes high NOx in a fuel mixture?
1. Lean Fuel Mixture – Lean fuel mixtures cause high NOx. A lean fuel mixture exists when less fuel then required is delivered to the combustion chambers or when more air then necessary is added to the fuel. In either case the lack of gasoline needed to cool the combustion chambers down is not present.