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Check your EGR valve. I have a 95 Accord and failed with High NOx, double the limit. I replaced the EGR valve and cleaned the EGR ports on the intake, they are under the fuel rail. I passed on the second attempt. The ERG valve was 140.00. It took a few hours to scrape the carbon off the clogged ports, some carb cleaner helps.
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What would make your 1988 Honda accord run high rpm's when first started then when you go to make a stop it stalls?
Might want to look at this? http://www.hondacarforum.com/honda-2/11969-does-your-carburated-honda-run-rough-lack-acceleration-smog-nox-trouble-read-fix.html
What causes high nitrogen oxides in a 1995 jeep Cherokee?
nox is from exhaust temps too high or a cat. convertor breakdown.
What causes High NOx in 87 Volvo 740 non-turbo to fail state inspection?
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.
What does nox do in Harry Potter?
The spell nox is the opposite of lumos. Lumos causes light to appear at the end of the caster's wand, so nox extinguishes the light emitting from the wand.
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 could cause the nox to be to high on a 1999 dodge durango?
Bad EGR, Exhaust Gas Recirculation valve. That is what reduces NoX emissions
O2 sensor can cause high Nox?
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
How are nitrogen oxides produced?
it is produced form animals, plants and factory.
What typically causes high CO readings on a 91 Honda prelude SI?
High HC is unburnt fuel. Check the O2 sensors, Plugs, wires,cap ,rotor, timing. If it failed CO & Nox also check the converter. Possible that it may not have been properly warmed up before testing. I would recommend looking at the o2 sensor (you only have one on your car) and the coolant temp sensor.
What will cause high nox on your 1999 Chevy s10 2.2?
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.
Why might an '89 Honda Civic fail an emissions test 3 times because of high readings on idling after changing the O2 sensor and catalytic converter?
Depends on which of the readings failed. Was it CO (carbon monoxide), HC (hydrocarbons), NOx (nitrous of oxides), or a combination of them?
How tall is Kara Nox?
Kara Nox is 5' 4".
