4.0 V8 emissions numbers
Hope someone is knowledgable about emissions......
Went through "Aircare" yesterday and passed! I was expecting to fail as my oxygen sensors are original (10 years old). The numbers are interesting but confusing. Here are the data:
240 second......... / Maximum // Vehicle ///Average passing ////Result
Driving test......... / Allowable //Reading /// Reading
Hydrocarbons...... / 0.5000 // 0.0588 /// 0.2433 //// PASS
grams/km
Carbon monoxide .. / 8.0800 // 0.7846 /// 3.8783 //// PASS
grams/km
Oxides of Nitrogen / 1.1200 // 1.0360 /// 0.4527 //// PASS
grams/km
You'll note that the Hydrocarbons (unburnt fuel) and carbon monoxide are both very low - roughly 1/10th allowable amounts. The oxides of nitrogen however are over double the average passing reading. Why would the NOx gasses be so high? Can anyone explain? Thanks.
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