From: jpg@gif.com.invalid   
      
   A friend of mine has a 94 5VZ 4Runner. It failed on the 15mph test, too much   
   NO more than double allowed.  It passed fine on the 25mph test, but still in   
   the upper limits.  CO2 and HC levels are within normal or below average.   
      
   The SMOG tech suggested it was running too lean.  I don't think it's the   
   CAT, IMHO, but I'm leaning towards clogged injectors or bad MAF sensor, but   
   usually it would run rich if the MAF is bad.  The EGR valve was recently   
   replaced, but I'm not sure if it was replaced before or after the SMOG test.   
      
   What else would cause the NO to be so high?   
      
   TIA   
      
   JW   
      
   P.S.  I'm referring to California SMOG test.   
      
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