...passed smog but numbers went up.? my numbers for no(ppm) from 2 years ago to the smog test I did the other day went up from 630 at 15 mph to 987 also the numbers at 25 mph went from 757 2 years ago to 814 today. what can I do to reduce these numbers next time I take smog test?
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02-06-2009, 10:09 PM #1Junior Member
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what does NO (PPM) mean on californias smog test? what does it measure? I...
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02-06-2009, 10:09 PM #2Senior Member
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Nitric oxide or nitrogen monoxide is a chemical compound with chemical formula NO. This gas is an important signaling molecule in the body of mammals, including humans, and is an extremely important intermediate in the chemical industry. It is also a toxic air pollutant produced by cigarette smoke, automobile engines and power plants.
Tune up, new catalytic converter, etc. none of it worth doing if you keep passing the test.
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