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1994 Honda Civic LX 1.5 L - Failed High Speed Emissions Nox(ppm)
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Jwb014
New User
Nov 6, 2012, 1:09 PM
Post #1 of 2
(2217 views)
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1994 Honda Civic LX 1.5 L - Failed High Speed Emissions Nox(ppm)
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I took my car in for inspection. It failed the High Speed Emissions Nox(ppm) test. The Standard is 1240 and my result was 1267. How can I lower my Nox(ppm)?
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 6, 2012, 1:20 PM
Post #2 of 2
(2210 views)
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Re: 1994 Honda Civic LX 1.5 L - Failed High Speed Emissions Nox(ppm)
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NOX is caused by high combustion temperatures so look at things like
- EGR system inoperative
- engine temp too high
- heavy carbon buildup on piston dome
- timing too far advanced (although too low will cause high HC)
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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