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emissions quesitons on Nox, low & high speeds 200 1986

posted by  bcg on  Thu Feb 14 05:15 CST 2008
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last visit: Sun Jul 27 08:12 CST 2014
[RELATED]


all,
i passed my inspection on the 2nd try, here in texas.
before the 2nd try, i replaced injector o-rings, 02 sensor, distr rotor & cap.

i also plugged the distr vacuum line.

results on high speed:
std curr
HC(ppm) 162 19 pass
CO% 1.04 0.10 pass
CO2% 14.7 -
O2 .2 -
Nox 1163 373 pass

low speed:
HC(ppm) 167 83 pass
CO% .94 0.45 pass
CO2% 14.1 -
O2 .6 -
Nox 1273 1272 pass

So, my Nox passed by just 1 point. but my Nox on high speed, passed by a mile.

What would give these divergent Nox readings?
After reading many, many posts on Nox, how would i fix the low speed reading?

thanks again yall,
byron golden
86 245
92 245





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