1996 Jeep Grand Cherokee Limited...MY NOX ARE TOO HIGH....

1996 JEEP GRAND CHEROKEE LAREDO
198,000 MILES • 6 CYL • 2WD • AUTOMATIC
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KIMSCARTROUBLES
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  • 1 POST
I have taken my car 3 times for Smog and have failed all 3 times. We have replaced the Cat and exhaust, fuel filter and have given it a complete tune up and I am still failing @ 799 with a 508 limit on the 15 mph test. I am passing the 25 mph NOX test, but I don't know why I can't pass the 15? Any help or suggestions would be great! Thanks!!!
Feb 20, 2008 at 3:01 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Checked the EGR system thoroughly-its job is to reduce the combustion temperature to lower the formation of oxides of nitrogen.
Feb 20, 2008 at 4:07 PM
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