Thread: 190E 2.6 Failed CA SMOG
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  #10  
Old 11-29-2007, 10:02 PM
manny manny is offline
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Join Date: Feb 2003
Location: Ontario, Canada
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The EGR system is responsible for NOx reduction.
High HC is usually caused by such things as ignition problems ( misfires ), mechanical problems ( oil consumption ), etc.
Since you're okay on HC, I would focus totally on the EGR system.
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