0
NOx failures actually mean there is too much heat in the combustion chambers when the gas is 'burning'. Its either too lean or its got too much timing in it. Both will cause a lean (hot) condition. A 1992 has an OBD 1 system, so I'm thinking maybe O2 sensor, verify by doing a scan. The EGR doesn't show up on an OBD1 scan, make sure it works! The manual will tell you how to check the timing.
What else can I help you with?
Why does your 1989 Jeep Cherokee fail the nox part on emissions?
If there are no other problems and the vehicle is failing the NOX emissions test, it's probably running too lean. Check the EGR valve, fuel pressure and the Oxygen sensor.
Lexus 1993 failed NOX emission but passed CO emission test what might be the problem?
i would like to know the answer, as I'm buying a 93 Lexus that has failed on the NOX ANY IDEA?......
What causes High NOx in 94 Olds to fail state inspection?
NOx in the emission system would be the engine temperature burning to hot there could be a couple of problems but most of the NOx problems are a failing egr valve it circulates air in the engine and exhaust to help keep he engines running temperature down i would say replace the egr valve and your set
What emission comes from a car's exhaust?
The emissions are mainly nitrogen, carbon dioxide, NOx, water vapour and unburned hydrocarbons
What happens to the nitrogen in an internal combustion engine?
They become oxides of nitrogen or the emission NOx, this is controlled by the EGR valve to lower combustion temperatures and lower the NOx gas wich contributes to phot chemical smog, the stuff you see in the air.
What has the author A B Nunn written?
A. B Nunn has written: 'NOx emission factors for wood-fired boilers' -- subject(s): Fuelwood, Boilers, Pollution
What causes high nitrogen oxides in a 1995 jeep Cherokee?
nox is from exhaust temps too high or a cat. convertor breakdown.
Which is source of emission leading to the eventual formation of surface ozone as a pollutant?
The primary source of emission leading to the formation of surface ozone as a pollutant is the release of nitrogen oxides (NOx) and volatile organic compounds (VOCs) from human activities, such as fossil fuel combustion, industrial processes, and vehicle emissions. These emissions react with sunlight to form ozone, particularly in areas with high levels of NOx and VOCs.
What are the Vehicle emission tests requirements?
most test hydrocarbons, co2 & oxides of nitroge (nox). Specs vary with vehicle, year make, model & engine size
Define emission system?
An Emission system can include many things depending on the vehicle. The carbon canister/purge valve- prevents Hydro carbon vapors from escaping from the fuel system. EGR system helps lower NOx levels, catalytic converters - helps converter crbon monoxide and HCs into carbon dioxide and water thru a chemical reaction. On diesels they now have Diesel exhaust fluid which helps lower NOx levels.
Why would a 1992 Accord EX fail an emissions test with high hc CO2 but pass the nox in the 40 kmhr test?
Two possibilities come to mind, strictly theoretical since I don't work as a mechanic, I am an engineer: 1. Running too rich. This lowers the combustion temperature which keeps NOX low but the unburned hydrocarbons and incomplete combustion result in high HC and CO emission. Check O2 sensor, airflow/airmass sensor, computer codes, injectors, etc. 2. An alternative theory is that the catalyst is no longer effective, or perhaps if it has air injection, the air pump is no longer doing its job - the catalyst cannot burn off the pollutants because there is no oxygen available in the exhaust stream or the material is no longer usable.
What is the meaning of sox and nox in boiler?
SOx ana nox
