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E34 (1989 - 1995)

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  #26  
Old 02-02-2013, 04:49 PM
Larrick Larrick is offline
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Location: Berkeley California
 
Join Date: Sep 2009
Posts: 574
Mein Auto: 1994 525it
My 1994 525it failed smog. The test station was only a few blocks from my home. the tester told me to take the car on the highway at speeds above 50 mph for 10 minutes. I drove back in and it passed with flying colors.
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  #27  
Old 06-26-2014, 05:30 PM
jhkim jhkim is offline
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Location: San Francisco CA
 
Join Date: Dec 2012
Posts: 42
Mein Auto: 525i
After 18 months, I did another smog test. This is the previous result.
15mph 25mph
%CO2 15.4 15.4
%O2 0.0 0.0
HC 81/81 39/40
CO 0.14/0.47 0.13/0.30
NO 271/478 64/484

The result from today.
15mph 25mph
%CO2 14.9 14.9 ( decreased )
%O2 0.1 0.0
HC 40/81 39/40 ( significantly decreased in 15mpg. I guess it is because I fixed a vacuum leak. )
CO 0.10/0.47 0.09/0.30 ( decreased )
NO 393/478 241/484 ( increased a lot for some reasons )

Overall it is better than before but NO is increased by far. It passed this year but I might need to do something to decrease NO next time.

Last edited by jhkim; 06-26-2014 at 06:23 PM.
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