1994 Nissan Truck Won't pass smog inspection High NOX emiss

1994 NISSAN TRUCK
163,000 MILES • 6 CYL • 4WD • AUTOMATIC
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MARK DENNES
  • MEMBER
  • 1 POST
Got any fairly inexpensive tips? And is there anyway to tell if NOX emissions are being reduced without expensive testing equiptment? Thanks
Jan 14, 2008 at 11:37 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
There's an emission control device in your system called EGR its primary purpose is to reduce oxides of nitrogen-check it out might not be opening due to carboned-up.
Jan 16, 2008 at 2:18 PM
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