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Old 08-03-2009, 12:41 PM
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stevenstevensteven stevenstevensteven is offline
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Join Date: May 2001
Location: NE Florida
Posts: 200
Quote:
Originally Posted by M.B.DOC View Post
If you are getting a duty cycle reading, then the O2 sensor and computer are "working".
Yup, certainly seems like my Jetronic system is functioning properly... And from all my reading it appears that all my emission figures are very good EXCEPT for NOx. Latest emissions results (CO has gotten very low):

MPH=15 RPM=1520 %CO2=15.0 %O2=0.1 HC(PPM)=53 CO(%)=.03 NOx(PPM) =1508 FAIL
MPH=25 RPM=1793 %CO2=15.1 %O2=0.0 HC(PPM)=44 CO(%)=.06 NOx(PPM)=1156 FAIL

So, if I am now faced with replacing the Catalytic Converter system, does this mean replacing:
  1. just the rear Cat with another 3-way system?
  2. just the rear Cat with any aftermarket Cat? (which I've already done )
  3. just the two front pre-Cats?
  4. all three Cats with an OEM replacements?
  5. or some other solution?
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Steven
1989 260E (276K miles)
1995 E320 (50K miles)
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